alleryNumber of bivalents (paired homolog pairs) at metaphase I of a cell with 2n = 12:
A3
B24
C6 (n bivalents, where n = 6 since 2n = 12)
D12
Answer & Solution
Correct answer: C. 6 (n bivalents, where n = 6 since 2n = 12)
**Bivalents (tetrads):** pairs of homologous chromosomes held together.
For 2n=12, n=6 bivalents.
Each bivalent has 4 chromatids.
Visible at metaphase I aligned at equator.
Reductional division separates the two homologs.
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