A somatic cell that has just completed the S phase of its cell cycle, as compared to gamete of the same…

A somatic cell that has just completed the S phase of its cell cycle, as compared to gamete of the same species, has:
  1. Twice the number of chromosomes and twice the amount of DNA
  2. Same number of chromosomes but twice the amount of DNA
  3. Twice the number of chromosomes and four times the amount of DNA
  4. Four times the number of chromosomes and twice the amount of DNA

Solution

S-phase (synthesis phase) is the part of the cell cycle in which DNA is replicated, but a number of chromosome does not change.
If a cell is diploid then after S phase DNA content in the cell will be 4 C and Chromosome in the cell will be 2 N.
While in a gamete,
DNA content in gamete = C
Chromosome in gamete = N
Hence, the Number of chromosome in a somatic cell will be twice than gamete while DNA content will be four times.

Asked in: NEET 2015 (Phase 1)

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