How many dna helices are there in a bivalent?
a) 1
b) 4
c) 8
d) some other amount.
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Ответ:
4
Explanation:
A bivalent refers to a chromosome complex that is formed by the pairing of two homologous chromosomes during the zygotene stage of prophase I of meiosis I. Therefore, there is a total of four chromatids in a bivalent. Each chromatid of a chromosome has one DNA helix. This makes a bivalent to have a total of 4 DNA helices (two in one homologous chromosome).
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