Question

A somatic cell that has just completed the S phase
of its cell cycle, as compared to gamete of the
same species, has
[AIPMT-2015]
(1) Four times the number of chromosomes and
twice the amount of DNA
(2) Twice the number of chromosomes and twice
the amount of DNA
(3) Same number of chromosomes but twice the
amount of DNA
(4) Twice the number of chromosomes and four
times the amount of DNA​

Answer 1

Answer:

(4) is correct answer.

Explanation:

Gametes contains half no of chromosomes and half DNA.

Somatic cell contains double no of chromosomes and double DNA.

When somatic cell completes S- phase, chromosome number remains same (containing four chromatids instead of two chromatids) and DNA doubles to become four times.