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Q.

If a mitocyte has 10 pg of DNA and 16 chromosomes in G1 then which of the following is correct ?

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a

S-phase will have 5 pg of DNA

b

The cell at anaphase stage will have 20 pg of DNA and a total of 32 chromosomes

c

G2-phase will have 8 chromosomes in a cell

d

The cell at metaphase will have 10 pg of DNA and a total of 16 chromosomes

answer is B.

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Detailed Solution

In anaphase it has 20 pg DNA because the amount of DNA is doubled in S stage and the two chromatids of each chromosome are formed. In Anaphase the chromosomes divide and there is formation of 32 chromosomes as daughter chromosomes because each chromatid of metaphase behaves as chromosome in anaphase.
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If a mitocyte has 10 pg of DNA and 16 chromosomes in G1 then which of the following is correct ?