| Dictionary, Encyclopedia and Thesaurus - The Free Dictionary 1,507,709,324 visitors served. |
|
Dictionary/ thesaurus | Medical dictionary | Legal dictionary | Financial dictionary | Acronyms | Idioms | Encyclopedia | Wikipedia encyclopedia | ? |
bivalent |
Also found in: Dictionary/thesaurus, Wikipedia, Hutchinson | 0.08 sec. |
|
bivalent /bi·va·lent/ (bi-va´lent) 1. divalent. 2. the structure formed by a pair of homologous chromosomes by synapsis along their length during the zygotene and pachytene stages of the first meiotic prophase.
bivalent [bīvā′lənt] Etymology: L, bis + valere, to be powerful 1 See divalent. (in genetics) a pair of synapsed homologous chromosomes that are attached to each other by chiasmata during the early first meiotic prophase of gametogenesis. The structure serves as the basis for the tetrads from which gametes are produced during the two meiotic divisions. 2 See valence, def. 1. bivalence, n. bivalent 1. having a valence of two. 2. denoting homologous chromosomes associated in pairs during the first meiotic prophase. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
|
| ? Mentioned in | ? References in periodicals archive | ||
|---|---|---|---|
| Several asymetric bivalents were clearly observed, formed by one chromosome with C-heterochromatin (one or two C-blocks) and another without C-heterochromatin (Figure 4). |
| Medical Dictionary |
| Free Tools: |
For surfers:
Browser extension |
Word of the Day |
Help
For webmasters: Free content | Linking | Lookup box | Double-click lookup | Partner with us |
|---|