| 释义 |
Definition of triploid in English: triploidadjective ˈtrɪplɔɪdˈtrɪplɔɪd Genetics 1(of a cell or nucleus) containing three homologous sets of chromosomes. a triploid endosperm nucleus Example sentencesExamples - The complete set of chromosomes has been duplicated in triploid and tetraploid nuclei.
- The triploid endosperm nucleus is derived from the fusion of two polar nuclei from the female parent and one sperm nucleus from the male.
- At this stage the triploid endosperm nuclei are approximately the same size as the diploid nuclei of the pericarp and nucellus.
- The first stage, grain enlargement, involves early, rapid division of the zygote and triploid nucleus.
- In this type of endosperm, which is the most common in cereals, development starts with several rounds of divisions of the triploid nucleus without cytokinesis.
- 1.1 (of an organism or species) composed of triploid cells.
Example sentencesExamples - In humans, 10% of spontaneous miscarriages are due to triploidy, but triploids of fish and amphibians can grow to adults and some species are even fixed in the triploid state.
- The endosperm, a result of double fertilization in flowering plants, is a triploid tissue whose genetic composition is more complex than diploid tissue.
- So-called triploid fish are unable to reach maturity and so are unable to breed.
- Two samples from the original data set were omitted because one was from a triploid plant and the other from a tetraploid.
- Long-term plans allow for the stocking of triploid grass carp, as well as dredging deeper holes and boat lanes.
noun ˈtrɪplɔɪdˈtrɪplɔɪd Genetics A triploid organism, variety, or species. this cross produces many infertile triploids Example sentencesExamples - In triploids, three separate haploid chromosome sets have been observed, as well as one diploid and one haploid set.
- Little is known about the transition from diploidy to polyploidy but in some species, triploids are thought to function as intermediates in this transition.
- In contrast the data do suggest that gene transcript level in the hybrid triploids is related to genomic dosage.
- The populations showed continuous morphological variation connecting the species, but karyotypically they consisted of only three types of plants: diploids, triploids, and tetraploids.
- Moreover, the high loads of inviable or weak aneuploid pollen produced by triploids induce high selfing rates in normally self-incompatible sexual diploids.
Derivatives noun Genetics In humans, 10% of spontaneous miscarriages are due to triploidy, but triploids of fish and amphibians can grow to adults and some species are even fixed in the triploid state. Example sentencesExamples - The first hypothesis assumes that triploidy is associated with the origin of parthenogenesis and that both diploid and tetraploid parthenogenetic forms are derived.
- Before examining the transcript levels in triploid hybrids, the effects of triploidy per se need to be considered.
- Multiple gestation, gestational trophoblastic disease, triploidy, trisomy 21 syndrome, and hydrops fetalis have been associated with an increased incidence of hyperemesis gravidarum.
- Although triploidy and haploidy of chromosomal regions in humans often cause viable or semiviable developmental defects, it is difficult to identify regions of the genome that are haplolethal.
Definition of triploid in US English: triploidadjectiveˈtrɪplɔɪdˈtriploid Genetics 1(of a cell or nucleus) containing three homologous sets of chromosomes. a triploid endosperm nucleus Example sentencesExamples - The complete set of chromosomes has been duplicated in triploid and tetraploid nuclei.
- The first stage, grain enlargement, involves early, rapid division of the zygote and triploid nucleus.
- In this type of endosperm, which is the most common in cereals, development starts with several rounds of divisions of the triploid nucleus without cytokinesis.
- At this stage the triploid endosperm nuclei are approximately the same size as the diploid nuclei of the pericarp and nucellus.
- The triploid endosperm nucleus is derived from the fusion of two polar nuclei from the female parent and one sperm nucleus from the male.
- 1.1 (of an organism or species) composed of triploid cells.
Example sentencesExamples - Two samples from the original data set were omitted because one was from a triploid plant and the other from a tetraploid.
- The endosperm, a result of double fertilization in flowering plants, is a triploid tissue whose genetic composition is more complex than diploid tissue.
- So-called triploid fish are unable to reach maturity and so are unable to breed.
- Long-term plans allow for the stocking of triploid grass carp, as well as dredging deeper holes and boat lanes.
- In humans, 10% of spontaneous miscarriages are due to triploidy, but triploids of fish and amphibians can grow to adults and some species are even fixed in the triploid state.
nounˈtrɪplɔɪdˈtriploid Genetics A triploid organism, variety, or species. this cross produces many infertile triploids Example sentencesExamples - The populations showed continuous morphological variation connecting the species, but karyotypically they consisted of only three types of plants: diploids, triploids, and tetraploids.
- Moreover, the high loads of inviable or weak aneuploid pollen produced by triploids induce high selfing rates in normally self-incompatible sexual diploids.
- Little is known about the transition from diploidy to polyploidy but in some species, triploids are thought to function as intermediates in this transition.
- In contrast the data do suggest that gene transcript level in the hybrid triploids is related to genomic dosage.
- In triploids, three separate haploid chromosome sets have been observed, as well as one diploid and one haploid set.
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