| 释义 |
synapsis
syn·ap·sis S0962700 (sĭ-năp′sĭs)n. pl. syn·ap·ses (-sēz) The side-by-side association of homologous chromosomes during the first prophase of meiosis.
[New Latin, from Greek sunapsis, point of contact; see synapse.]synapsis (sɪˈnæpsɪs) n, pl -ses (-siːz) 1. (Biology) cytology the association in pairs of homologous chromosomes at the start of meiosis2. (Physiology) another word for synapse[C19: from New Latin, from Greek sunapsis junction, from sunaptein to join together, from syn- + haptein to connect]syn•ap•sis (sɪˈnæp sɪs)
n., pl. -ses (-sēz). 1. the pairing of homologous chromosomes, one from each parent, during early meiosis. 2. synapse. [1645–55; < New Latin < Greek sýnapsis junction =synap-, s. of synáptein to make contact (syn- syn- + háptein to touch) + -sis -sis] syn•ap′tic (-tɪk) adj. syn•ap′ti•cal•ly, adv. Thesaurus| Noun | 1. |  synapsis - the side by side pairing of homologous maternal and paternal chromosomes at the start of meiosisleptotene - the first stage of the prophase of meiosisbiological process, organic process - a process occurring in living organisms |
Translationssynapsis
synapsis: see crossing overcrossing over,
process in genetics by which the two chromosomes of a homologous pair exchange equal segments with each other. Crossing over occurs in the first division of meiosis. At that stage each chromosome has replicated into two strands called sister chromatids.
..... Click the link for more information. .Synapsis the paired temporary association of homologous chromosomes during which an exchange of homologous chromosomal areas may occur. Under the influence of various factors, chromosomes readily contract into a ball during synapsis. The British scientist D. E. Moore described this phenomenon and introduced the term “synapsis” in 1895. synapsis[sə′nap·səs] (cell and molecular biology) Pairing of homologous chromosomes during the zygotene stage of meiosis. synapsis
synapsis [sĭ-nap´sis] the pairing off and union of homologous chromosomes from male and female pronuclei at the start of meiosis.sy·nap·sis (si-nap'sēz), The point-for-point pairing of homologous chromosomes during the prophase of meiosis. Synonym(s): synaptic phase [G. a connection, junction] synapsis (sĭ-năp′sĭs)n. pl. synap·ses (-sēz) The side-by-side association of homologous chromosomes during the first prophase of meiosis.syn·apse (sin'aps) The functional membrane-to-membrane contact of the nerve cell with another nerve cell, an effector (muscle, gland) cell, or a sensory receptor cell. The synapse subserves the transmission of nerve impulses, commonly from a club-shaped axon terminal (the presynaptic element) to the circumscript patch of the plasma membrane of the receiving cell (the postsynaptic element) on which the synapse occurs. In most cases, the impulse is transmitted by means of a chemical transmitter substance (such as acetylcholine, gamma-aminobutyric acid, dopamine, norepinephrine) released into a synaptic cleft that separates the presynaptic from the postsynaptic membrane; the transmitter is stored in synaptic vesicles in the presynaptic element. In other synapses, transmission takes place by direct propagation of the bioelectrical potential from the presynaptic to the postsynaptic membrane.
Synonym(s): synapsis. [syn- + G. hapto, to clasp]synapsis - the lying together of structures as in, for example, the junction of two nerve cells.
- (in genetics) the pairing of HOMOLOGOUS CHROMOSOMES in prophase 1 of MEIOSIS; the alignment of homologous regions of DNA prior to RECOMBINATION in prokaryotes.
synapsis
Words related to synapsisnoun the side by side pairing of homologous maternal and paternal chromosomes at the start of meiosisRelated Words- leptotene
- biological process
- organic process
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