英语词汇“embryo”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

WORD ORIGINembryo

Origin:

1300-1400 Medieval Latin, Greek embryon, from bryein ‘to swell’

EXAMPLES FROM OTHER DICTIONARIES

The government has banned all scientific research using human embryos.
When first formed, the embryo is only half a millimetre long.

EXAMPLES FROM THE CORPUS

In fact, the remaining cell did produce only half an embryo, so it seemed that Weismann was right again.
Now that scientists have access to human embryos, the question of genetic engineering arises.
This appears very early in development, when it is involved in compaction of the eight cell embryo and cell polarisation.
This problem is also seen with embryos produced by other technologies that require embryos to be cultured in test tubes before implantation.
This would explain why they are less able to support development in the embryos that are derived from them.
Wherever possible such parameters should be compared with those of embryos of the same age recovered in vivo.

Longman Language Activatora baby that is still developing in its mother's body► unborn child/baby

· Doctors do not know what the long-term effects of the drug will be on the unborn child.· Petra could feel her unborn baby moving inside her.

► fetus/foetus

British a baby that is developing in its mother's body - used especially by doctors: · By the end of the third month of pregnancy the foetus is a miniature human being.· The research focuses on how alcohol may harm the fetus.

► embryo

a baby that is in the very early stage of development inside its mother's body: · When first formed, the embryo is only half a millimetre long.· The government has banned all scientific research using human embryos.

WORD SETS► Biology

aerobic, adjectiveafterbirth, nounalgae, nounalimentary canal, nounamber, nounameba, nounamino acid, nounamoeba, nounanaconda, nounanaerobic, adjectiveandrogynous, adjectiveantibody, nounantigen, nounantitoxin, nounappendage, nounarm, nounarmour, nounasexual, adjectiveassimilation, nounatrophy, verbaviary, nounbacteria, nounbacteriology, nounbarnacle, nounbile, nounbinocular vision, nounbio-, prefixbiochemistry, nounbiodegradable, adjectivebiodiversity, nounbiohazard, nounbiological, adjectivebiological clock, nounbiology, nounbiomass, nounbiome, nounbiosphere, nounblind, nounbrain, nounbreathe, verbbreed, verbbreed, nounbreeding, nounbristle, nounbulb, nouncapsule, nouncarbohydrate, nouncarbon dioxide, nouncarnivore, nouncell, nouncellular, adjectivecellulose, nouncentral nervous system, nouncervical, adjectivecholesterol, nounchromosome, nouncirculation, nouncirculatory, adjectiveclass, nounclone, nouncold-blooded, adjectiveconceive, verbconch, nounconnective tissue, nouncopulate, verbcoral reef, nouncornea, nouncoronary, adjectivecorpuscle, nouncortex, nouncortisone, nouncowrie, nouncrab, nouncrawfish, nouncrayfish, nouncreature, nouncross, verbcrossbreed, nounculture, nouncytoplasm, noundecay, verbdecay, noundecompose, verbdefecate, verbdenizen, noundextrose, noundiaphragm, noundigest, verbdigestion, noundigestive, adjectiveDNA, noundorsal, adjectivedry rot, nounduct, noundwarf, noundwarf, adjectiveecological, adjectiveecology, nounecosystem, nounegg, nounejaculate, verbembryo, nounembryonic, adjectiveenzyme, nounepidermis, nounevolution, nounevolutionary, adjectiveexcrement, nounexcrescence, nounexcrete, verbexcretion, nounexhale, verbexoskeleton, nounextinction, nounfaeces, nounfamily, nounfang, nounfat, nounfatty acid, nounfauna, nounfeces, nounfeed, verbfemale, adjectivefemale, nounferment, verbferment, nounfertile, adjectivefertility, nounfertilize, verbfission, nounflank, nounflatulence, nounflesh, nounfleshy, adjectiveflightless, adjectiveflora, nounfoetal, adjectivefoetus, nounfoliage, nounfossil, nounfreak, nounfreshwater, adjectivefructose, noungamete, nounganglion, noungene, noungene pool, noungenera, genetic, adjectivegenetic code, noungenetic engineering, noungenetic fingerprinting, noungenetics, noungenome, noungenus, noungestation, noungland, nounglandular, adjectiveglucose, noungluten, noungonad, noungrass snake, noungrow, verbgrowth, nounhabitat, nounhaemoglobin, nounhearing, nounheart, nounhemisphere, nounherbivore, nounhereditary, adjectiveheredity, nounhermaphrodite, nounhibernate, verbhistamine, nounhoming, adjectivehormone, nounhost, nounimpregnate, verbimpulse, nounincubate, verbindigenous, adjectiveinfected, adjectiveinfertile, adjectiveinfest, verbingest, verbinhale, verbinseminate, verbinsensate, adjectiveinsulin, nounintegument, nounintercourse, nouninterferon, nounintestine, nouninvertebrate, nouninvoluntary, adjectiveiris, nounjaw, nounjelly, nounkidney, nounkrill, nounlactate, verblactation, nounlactic acid, nounleech, nounleg, nounlesser, adjectivelichen, nounlife, nounlife cycle, nounlife form, nounligament, nounlimb, nounlimpet, nounlipid, nounliver, nounliving fossil, nounlocomotion, nounlymph, nounlymph node, nounmale, adjectivemale, nounmammal, nounmandible, nounmate, nounmate, verbmembrane, nounmetabolism, nounmetabolize, verbmetamorphosis, nounmicrobe, nounmicrobiology, nounmicroorganism, nounmicroscopic, adjectivemigrate, verbmigratory, adjectivemiscarriage, nounmolar, nounmorphology, nounmotor, adjectivemould, nounmouth, nounmucous membrane, nounmucus, nounmulticellular, adjectivemuscle, nounmuscular, adjectivemutant, nounmutate, verbmutation, nounnatural history, nounnatural selection, nounnature, nounneck, nounnectar, nounnerve, nounnervous, adjectivenervous system, nounneural, adjectiveneuro-, prefixneurology, nounnode, nounnose, nounnostril, nounnucleic acid, nounnucleus, nounnutrient, nounnutriment, nounoesophagus, nounoestrogen, nounolfactory, adjectiveoptic, adjectiveorgan, nounorganic, adjectiveorganic chemistry, nounorganism, nounorifice, nounossify, verbosteo-, prefixoutgrowth, nounova, ovary, nounoverwinter, verboviduct, nounoviparous, adjectiveovulate, verbovum, nounparasite, nounpathogen, nounpedigree, nounpelvic, adjectivepelvis, nounpenile, adjectivepenis, nounpepsin, nounperiod, nounperspiration, nounperspire, verbphotosynthesis, nounphylum, nounpigment, nounpigmentation, nounplankton, nounplasma, nounpollinate, verbpostnatal, adjectivepregnancy, nounpregnant, adjectivepremature, adjectiveprenatal, adjectiveproduct, nounproliferation, nounpropagate, verbprotein, nounprotoplasm, nounprotozoan, nounpuberty, nounpulmonary, adjectivepulp, nounpulsation, nounputrefy, verbputrid, adjectivered blood cell, nounregurgitate, verbrenal, adjectivereproduce, verbreproduction, nounreproductive, adjectiverespiration, nounrespiratory, adjectiverespire, verbretina, nounroot, nounrot, verbrot, nounruff, nounsac, nounsaliva, nounsalivary gland, nounsalivate, verbsaltwater, adjectivescale, nounscallop, nounscaly, adjectivesebaceous, adjectivesecrete, verbsecretion, nounsemen, nounsense organ, nounsensory, adjectiveserum, nounsex, nounsex, verbsexless, adjectivesexual intercourse, nounsheath, nounshell, nounsibling, nounskeletal, adjectiveskeleton, nounskin, nounskull, nounspasm, nounspasmodic, adjectivespecies, nounspecimen, nounsperm, nounspiderweb, nounspinal cord, nounspine, nounspineless, adjectivestarch, nounstem cell, nounstimulate, verbstimulus, nounstrain, nounsubject, nounsubspecies, nounsucker, nounsucrose, nounsweat, verbsweat, nounsweat gland, nounsymbiosis, nounsystemic, adjectivetail, nountaxonomy, nounteeth, testosterone, nountest-tube baby, nountissue, nountrachea, nountube, noununicellular, adjectiveurethra, nounuric, adjectiveurinate, verburine, nounvariety, nounvector, nounvein, nounvenom, nounvenomous, adjectiveventricle, nounvertebra, nounvertebrate, nounvivisection, nounwarm-blooded, adjectivewean, verbwildlife, nounwindpipe, nounyolk, noun

COLLOCATIONS FROM THE CORPUSADJECTIVE► developing

· This hormone is produced by the developing embryo within a few days of the egg being fertilised.· There won't be a brain being wired up in the first place, unless there is a complete developing embryo.· Chicken eggs are large because of the yolk which acts as a source of nutrients for the growth of the developing embryo.· Genes only start to mean something when they are translated, via protein synthesis, into growing-rules for a developing embryo.

► early

· Surprisingly, cells that will form the gut are on the outside surface of many early embryos.· The number of cell divisions in the early embryo that are controlled by the cytoplasm varies from species to species.· It could, for example, challenge the absolute opposition by anti-abortionists to research on human eggs or early embryos.· A quite different way of creating a chimaera is to fuse two early mouse embryos.· The simplest two-instrument cell injection technique for both primitive streak stage and for early somite stage embryos will be described.· Among other things, imprinting is known to take place during gamete formation, whereas differentiation takes place in the early embryo.· But does regulation continue throughout development, or is it just a property of the early embryo?· It is possible to label the cells of the early embryo and follow what they do during development.

► human

· He observed that his ears, made almost transparent by the sunlight, closely resembled a pair of human embryos.· Those scenes now include everything from human embryos, eclipses, insects and seed pods to comets, hands and candles.· Six years ago Congress banned assistance for any form of research that involved creating or destroying human embryos.· Was it overlooked because it demonstrates that insights into genetic disorders can be gained without use of human embryos?· The growth of the human embryo recapitulated the history of animal life as revealed by the fossil record.· Both sides come together in their opposition to the cloning of human embryos, and object to commercial control over the process.· In the near future however scientists will be able to graft new genes into human eggs and embryos.· In 1828 von Baer showed that the human embryo never passes through a stage equivalent to an adult fish or reptile.

► new

· Instead, he had simply made new embryos by nuclear transfer.· In mammals, the cytoplasm controls only a few divisions, and then the genes of the new embryo take over.· It was as if the graft was setting up a whole new embryo and re-specifying the positions of the cells in its vicinity.

► normal

· Further studies are directed towards the understanding of the role which the stem cell control factor DIA/LIF plays in the normal embryo.· Control injections with preimmune serum produced normal embryos.· Even the early sea-urchin embryo can be separated into single cells and will reform a more or less normal embryo.

► old

· The fetal membranes from older embryos are also best handled initially as solid tissue because of difficulties in their mechanical disaggregation.· For older embryos, 100% serum is advisable.· A typical half embryo was seen to emerge just as if an older embryo had been sliced in two with a razor.

► young

· But it is also possible to split young embryos artificially, and again produce whole animals from the individual cells.· In our experiments with Megan and Morag and Dolly, we placed two young embryos into each receiving ewe.· Driesch and the early Spemann created clones merely by splitting very young embryos, to give identical twins or quads.· The cell cycle at conception and in young embryos A new life begins with the fusion of sperm and egg.

NOUN► cell

· So now they fused karyoplasts taken from two-cell embryos with enucleated zygotes.· He produced bigger clones by embryo splitting, once deriving a set of quin lambs from an eight-cell embryo.· Is it possible, they asked, that nuclei from two-cell embryo are simply less robust than nuclei from zygotes?· This appears very early in development, when it is involved in compaction of the eight cell embryo and cell polarisation.· What would happen if they transferred nuclei from two-cell embryos into enucleated cytoplasts taken from two-cell embryos?

► chick

· When researchers tried to mimic the results on other animals, such as chick embryos, it did not have the same effect.· The chick embryo proper comes from a very small region resting on the yolk and which is equivalent to the mammalian egg.· She noticed that the nuclei of the cells of the quail embryo looked slightly different from those of the chick embryo.· Because transplanted quail cells will behave normally in chick embryos, she realized she had an invaluable natural marker.

► mouse

· It is quite convenient to simplify the problem, and instead of thinking about sea-urchin or mouse embryos, to think about flags.· A quite different way of creating a chimaera is to fuse two early mouse embryos.· Two cell lineage markers have been applied recently to the pre-implantation mouse embryo.· It is possible to rearrange the cells of the early mouse embryo in numerous combinations and normal development will still occur.

► research

· To say this is not to belittle the sincere concern shown by many religious people in the debate over embryo research.· Among recent subjects have been council house sales, public attitudes to embryo research and the effects of unemployment on young women.· Precious quality Whether the timing of this programme was influenced by the current debate on embryo research, I do not know.

VERB► create

· Six years ago Congress banned assistance for any form of research that involved creating or destroying human embryos.

► develop

· Each of the two blastomeres developed into a whole embryo.· Like all animals we come from one cell that develops into an embryo which forms the adult.

► form

· When first formed the embryo is only half a millimetre long, and bears no resemblance to its future form.

► freeze

· The new research should also help to avoid freezing and storing excess embryos, she says.· Remember the Barbasol can full of frozen embryos, lost in the rainy mire?· Animals are preserved as frozen embryos or as sperm freeze-dried to a powder and brought back to life.

► implant

· They will choose a shortlist of 200, who will be implanted with 10 cloned embryos.

► produce

· This hormone is produced by the developing embryo within a few days of the egg being fertilised.· We also produced some embryos when their cells were in G2 by use of yet another agent, cycloheximide.· The unfertilised egg cell began to divide to produce embryos that sometimes developed well.· In fact, the remaining cell did produce only half an embryo, so it seemed that Weismann was right again.· He then shook four-cell urchin embryos apart, and produced four complete embryos.

► transfer

· Nuclei could be successfully transferred between embryos that were in the same developmental domain, but not between embryos in different domains.

单词	embryo
释义	embryoem‧bry‧o /ˈembriəʊ $ -brioʊ/ noun (plural embryos) [countable] Word Origin WORD ORIGINembryo Origin: 1300-1400 Medieval Latin, Greek embryon, from bryein ‘to swell’ Examples EXAMPLES FROM OTHER DICTIONARIES The government has banned all scientific research using human embryos. When first formed, the embryo is only half a millimetre long. EXAMPLES FROM THE CORPUS In fact, the remaining cell did produce only half an embryo, so it seemed that Weismann was right again. Now that scientists have access to human embryos, the question of genetic engineering arises. This appears very early in development, when it is involved in compaction of the eight cell embryo and cell polarisation. This problem is also seen with embryos produced by other technologies that require embryos to be cultured in test tubes before implantation. This would explain why they are less able to support development in the embryos that are derived from them. Wherever possible such parameters should be compared with those of embryos of the same age recovered in vivo. Thesaurus Longman Language Activatora baby that is still developing in its mother's body► unborn child/baby · Doctors do not know what the long-term effects of the drug will be on the unborn child.· Petra could feel her unborn baby moving inside her. ► fetus/foetus British a baby that is developing in its mother's body - used especially by doctors: · By the end of the third month of pregnancy the foetus is a miniature human being.· The research focuses on how alcohol may harm the fetus. ► embryo a baby that is in the very early stage of development inside its mother's body: · When first formed, the embryo is only half a millimetre long.· The government has banned all scientific research using human embryos. WORD SETS► Biology aerobic, adjectiveafterbirth, nounalgae, nounalimentary canal, nounamber, nounameba, nounamino acid, nounamoeba, nounanaconda, nounanaerobic, adjectiveandrogynous, adjectiveantibody, nounantigen, nounantitoxin, nounappendage, nounarm, nounarmour, nounasexual, adjectiveassimilation, nounatrophy, verbaviary, nounbacteria, nounbacteriology, nounbarnacle, nounbile, nounbinocular vision, nounbio-, prefixbiochemistry, nounbiodegradable, adjectivebiodiversity, nounbiohazard, nounbiological, adjectivebiological clock, nounbiology, nounbiomass, nounbiome, nounbiosphere, nounblind, nounbrain, nounbreathe, verbbreed, verbbreed, nounbreeding, nounbristle, nounbulb, nouncapsule, nouncarbohydrate, nouncarbon dioxide, nouncarnivore, nouncell, nouncellular, adjectivecellulose, nouncentral nervous system, nouncervical, adjectivecholesterol, nounchromosome, nouncirculation, nouncirculatory, adjectiveclass, nounclone, nouncold-blooded, adjectiveconceive, verbconch, nounconnective tissue, nouncopulate, verbcoral reef, nouncornea, nouncoronary, adjectivecorpuscle, nouncortex, nouncortisone, nouncowrie, nouncrab, nouncrawfish, nouncrayfish, nouncreature, nouncross, verbcrossbreed, nounculture, nouncytoplasm, noundecay, verbdecay, noundecompose, verbdefecate, verbdenizen, noundextrose, noundiaphragm, noundigest, verbdigestion, noundigestive, adjectiveDNA, noundorsal, adjectivedry rot, nounduct, noundwarf, noundwarf, adjectiveecological, adjectiveecology, nounecosystem, nounegg, nounejaculate, verbembryo, nounembryonic, adjectiveenzyme, nounepidermis, nounevolution, nounevolutionary, adjectiveexcrement, nounexcrescence, nounexcrete, verbexcretion, nounexhale, verbexoskeleton, nounextinction, nounfaeces, nounfamily, nounfang, nounfat, nounfatty acid, nounfauna, nounfeces, nounfeed, verbfemale, adjectivefemale, nounferment, verbferment, nounfertile, adjectivefertility, nounfertilize, verbfission, nounflank, nounflatulence, nounflesh, nounfleshy, adjectiveflightless, adjectiveflora, nounfoetal, adjectivefoetus, nounfoliage, nounfossil, nounfreak, nounfreshwater, adjectivefructose, noungamete, nounganglion, noungene, noungene pool, noungenera, genetic, adjectivegenetic code, noungenetic engineering, noungenetic fingerprinting, noungenetics, noungenome, noungenus, noungestation, noungland, nounglandular, adjectiveglucose, noungluten, noungonad, noungrass snake, noungrow, verbgrowth, nounhabitat, nounhaemoglobin, nounhearing, nounheart, nounhemisphere, nounherbivore, nounhereditary, adjectiveheredity, nounhermaphrodite, nounhibernate, verbhistamine, nounhoming, adjectivehormone, nounhost, nounimpregnate, verbimpulse, nounincubate, verbindigenous, adjectiveinfected, adjectiveinfertile, adjectiveinfest, verbingest, verbinhale, verbinseminate, verbinsensate, adjectiveinsulin, nounintegument, nounintercourse, nouninterferon, nounintestine, nouninvertebrate, nouninvoluntary, adjectiveiris, nounjaw, nounjelly, nounkidney, nounkrill, nounlactate, verblactation, nounlactic acid, nounleech, nounleg, nounlesser, adjectivelichen, nounlife, nounlife cycle, nounlife form, nounligament, nounlimb, nounlimpet, nounlipid, nounliver, nounliving fossil, nounlocomotion, nounlymph, nounlymph node, nounmale, adjectivemale, nounmammal, nounmandible, nounmate, nounmate, verbmembrane, nounmetabolism, nounmetabolize, verbmetamorphosis, nounmicrobe, nounmicrobiology, nounmicroorganism, nounmicroscopic, adjectivemigrate, verbmigratory, adjectivemiscarriage, nounmolar, nounmorphology, nounmotor, adjectivemould, nounmouth, nounmucous membrane, nounmucus, nounmulticellular, adjectivemuscle, nounmuscular, adjectivemutant, nounmutate, verbmutation, nounnatural history, nounnatural selection, nounnature, nounneck, nounnectar, nounnerve, nounnervous, adjectivenervous system, nounneural, adjectiveneuro-, prefixneurology, nounnode, nounnose, nounnostril, nounnucleic acid, nounnucleus, nounnutrient, nounnutriment, nounoesophagus, nounoestrogen, nounolfactory, adjectiveoptic, adjectiveorgan, nounorganic, adjectiveorganic chemistry, nounorganism, nounorifice, nounossify, verbosteo-, prefixoutgrowth, nounova, ovary, nounoverwinter, verboviduct, nounoviparous, adjectiveovulate, verbovum, nounparasite, nounpathogen, nounpedigree, nounpelvic, adjectivepelvis, nounpenile, adjectivepenis, nounpepsin, nounperiod, nounperspiration, nounperspire, verbphotosynthesis, nounphylum, nounpigment, nounpigmentation, nounplankton, nounplasma, nounpollinate, verbpostnatal, adjectivepregnancy, nounpregnant, adjectivepremature, adjectiveprenatal, adjectiveproduct, nounproliferation, nounpropagate, verbprotein, nounprotoplasm, nounprotozoan, nounpuberty, nounpulmonary, adjectivepulp, nounpulsation, nounputrefy, verbputrid, adjectivered blood cell, nounregurgitate, verbrenal, adjectivereproduce, verbreproduction, nounreproductive, adjectiverespiration, nounrespiratory, adjectiverespire, verbretina, nounroot, nounrot, verbrot, nounruff, nounsac, nounsaliva, nounsalivary gland, nounsalivate, verbsaltwater, adjectivescale, nounscallop, nounscaly, adjectivesebaceous, adjectivesecrete, verbsecretion, nounsemen, nounsense organ, nounsensory, adjectiveserum, nounsex, nounsex, verbsexless, adjectivesexual intercourse, nounsheath, nounshell, nounsibling, nounskeletal, adjectiveskeleton, nounskin, nounskull, nounspasm, nounspasmodic, adjectivespecies, nounspecimen, nounsperm, nounspiderweb, nounspinal cord, nounspine, nounspineless, adjectivestarch, nounstem cell, nounstimulate, verbstimulus, nounstrain, nounsubject, nounsubspecies, nounsucker, nounsucrose, nounsweat, verbsweat, nounsweat gland, nounsymbiosis, nounsystemic, adjectivetail, nountaxonomy, nounteeth, testosterone, nountest-tube baby, nountissue, nountrachea, nountube, noununicellular, adjectiveurethra, nounuric, adjectiveurinate, verburine, nounvariety, nounvector, nounvein, nounvenom, nounvenomous, adjectiveventricle, nounvertebra, nounvertebrate, nounvivisection, nounwarm-blooded, adjectivewean, verbwildlife, nounwindpipe, nounyolk, noun Collocations COLLOCATIONS FROM THE CORPUSADJECTIVE► developing · This hormone is produced by the developing embryo within a few days of the egg being fertilised.· There won't be a brain being wired up in the first place, unless there is a complete developing embryo.· Chicken eggs are large because of the yolk which acts as a source of nutrients for the growth of the developing embryo.· Genes only start to mean something when they are translated, via protein synthesis, into growing-rules for a developing embryo. ► early · Surprisingly, cells that will form the gut are on the outside surface of many early embryos.· The number of cell divisions in the early embryo that are controlled by the cytoplasm varies from species to species.· It could, for example, challenge the absolute opposition by anti-abortionists to research on human eggs or early embryos.· A quite different way of creating a chimaera is to fuse two early mouse embryos.· The simplest two-instrument cell injection technique for both primitive streak stage and for early somite stage embryos will be described.· Among other things, imprinting is known to take place during gamete formation, whereas differentiation takes place in the early embryo.· But does regulation continue throughout development, or is it just a property of the early embryo?· It is possible to label the cells of the early embryo and follow what they do during development. ► human · He observed that his ears, made almost transparent by the sunlight, closely resembled a pair of human embryos.· Those scenes now include everything from human embryos, eclipses, insects and seed pods to comets, hands and candles.· Six years ago Congress banned assistance for any form of research that involved creating or destroying human embryos.· Was it overlooked because it demonstrates that insights into genetic disorders can be gained without use of human embryos?· The growth of the human embryo recapitulated the history of animal life as revealed by the fossil record.· Both sides come together in their opposition to the cloning of human embryos, and object to commercial control over the process.· In the near future however scientists will be able to graft new genes into human eggs and embryos.· In 1828 von Baer showed that the human embryo never passes through a stage equivalent to an adult fish or reptile. ► new · Instead, he had simply made new embryos by nuclear transfer.· In mammals, the cytoplasm controls only a few divisions, and then the genes of the new embryo take over.· It was as if the graft was setting up a whole new embryo and re-specifying the positions of the cells in its vicinity. ► normal · Further studies are directed towards the understanding of the role which the stem cell control factor DIA/LIF plays in the normal embryo.· Control injections with preimmune serum produced normal embryos.· Even the early sea-urchin embryo can be separated into single cells and will reform a more or less normal embryo. ► old · The fetal membranes from older embryos are also best handled initially as solid tissue because of difficulties in their mechanical disaggregation.· For older embryos, 100% serum is advisable.· A typical half embryo was seen to emerge just as if an older embryo had been sliced in two with a razor. ► young · But it is also possible to split young embryos artificially, and again produce whole animals from the individual cells.· In our experiments with Megan and Morag and Dolly, we placed two young embryos into each receiving ewe.· Driesch and the early Spemann created clones merely by splitting very young embryos, to give identical twins or quads.· The cell cycle at conception and in young embryos A new life begins with the fusion of sperm and egg. NOUN► cell · So now they fused karyoplasts taken from two-cell embryos with enucleated zygotes.· He produced bigger clones by embryo splitting, once deriving a set of quin lambs from an eight-cell embryo.· Is it possible, they asked, that nuclei from two-cell embryo are simply less robust than nuclei from zygotes?· This appears very early in development, when it is involved in compaction of the eight cell embryo and cell polarisation.· What would happen if they transferred nuclei from two-cell embryos into enucleated cytoplasts taken from two-cell embryos? ► chick · When researchers tried to mimic the results on other animals, such as chick embryos, it did not have the same effect.· The chick embryo proper comes from a very small region resting on the yolk and which is equivalent to the mammalian egg.· She noticed that the nuclei of the cells of the quail embryo looked slightly different from those of the chick embryo.· Because transplanted quail cells will behave normally in chick embryos, she realized she had an invaluable natural marker. ► mouse · It is quite convenient to simplify the problem, and instead of thinking about sea-urchin or mouse embryos, to think about flags.· A quite different way of creating a chimaera is to fuse two early mouse embryos.· Two cell lineage markers have been applied recently to the pre-implantation mouse embryo.· It is possible to rearrange the cells of the early mouse embryo in numerous combinations and normal development will still occur. ► research · To say this is not to belittle the sincere concern shown by many religious people in the debate over embryo research.· Among recent subjects have been council house sales, public attitudes to embryo research and the effects of unemployment on young women.· Precious quality Whether the timing of this programme was influenced by the current debate on embryo research, I do not know. VERB► create · Six years ago Congress banned assistance for any form of research that involved creating or destroying human embryos. ► develop · Each of the two blastomeres developed into a whole embryo.· Like all animals we come from one cell that develops into an embryo which forms the adult. ► form · When first formed the embryo is only half a millimetre long, and bears no resemblance to its future form. ► freeze · The new research should also help to avoid freezing and storing excess embryos, she says.· Remember the Barbasol can full of frozen embryos, lost in the rainy mire?· Animals are preserved as frozen embryos or as sperm freeze-dried to a powder and brought back to life. ► implant · They will choose a shortlist of 200, who will be implanted with 10 cloned embryos. ► produce · This hormone is produced by the developing embryo within a few days of the egg being fertilised.· We also produced some embryos when their cells were in G2 by use of yet another agent, cycloheximide.· The unfertilised egg cell began to divide to produce embryos that sometimes developed well.· In fact, the remaining cell did produce only half an embryo, so it seemed that Weismann was right again.· He then shook four-cell urchin embryos apart, and produced four complete embryos. ► transfer · Nuclei could be successfully transferred between embryos that were in the same developmental domain, but not between embryos in different domains. 1an animal or human that has not yet been born, and has just begun to develop → foetus2in embryo at a very early stage of development: The system already exists in embryo.
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