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Q.

How many chromatids are present in the chromosomes during metaphase and G1 phase of the cell cycle?

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a

Metaphase- 4 chromatids, G1 phase- 2 chromatids

b

Metaphase- 2 chromatids, G1 phase- 1 chromatid

c

Metaphase- 4 chromatids, G1 phase- 4 chromatids

d

Metaphase- 8 chromatids, G1 phase- 4 chromatids

answer is B.

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Detailed Solution

The metaphase chromosomes has two sister chromatids attached at the same centromere. During the G1 phase, the DNA did not undergo replication and therefore has only one chromatid per chromosome.

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