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Q.

If a diploid cell with 20 chromosomes and 32 C DNA enters a cell cycle then what will be the number of chromosomes and DNA after S-phase?

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a

20 chromosomes and 32 C DNA

b

20 chromosomes and 64 C DNA

c

40 chromosomes and 32 C DNA

d

40 chromosomes and 64 C DNA

answer is B.

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Detailed Solution

In S-phase, the amount of DNA doubles but number of chromosomes remain same.Cells with 20 chromosome and 32 C DNA in G1 phase results in cell with 20 chromosome and 64 C DNA in S-phase.
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