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Meiosis

If there are ...

Question

If there are 30 chromosomes in G1 phase then what will be number of bivalents in zygotene stage?

A

15

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B

30

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C

45

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D

60

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Solution

The correct option is A 15
When the zygotene stage begins, the homologous chromosomes pair up to for bivalents or tetrads. Homologous chromosomes pair and form synapses. The paired chromosomes are called bivalents. If there are 30 chromosomes in G1 phase, then there will be 15 bivalents in zygotene stage.

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