The number of chromosomes in a somatic cell, of a diploid organism (with original of 10 pairs), after DNA replication and before mitosis would be

10

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20

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30

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40

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50

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Solution

The correct option is C $20$
The somatic cell has 20 chromosomes (10 pairs). DNA replication doubles the DNA content which is accommodated in two chromatids of each chromosome. The total number of chromosomes remains same. So, the given cell with 20 chromosomes will have the same number of chromosomes after DNA replication and before mitosis. So, the correct answer is B.

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Similar questions

A diploid somatic cell of rat has a total of 42 chromosomes (2n = 42). What will be the number of DNA molecules in anaphase of mitosis?

Q. Pick out the correct statements.
(A) Mitosis takes place in the somatic cells and meiosis takes place in the germ cells.
(B) During mitosis, the DNA replicates once for one cell division and in meiosis, the DNA replicates twice for two cell divisions.
(C) Mitosis and meiosis occur both in sexually reproducing organisms.

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