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Get Answers to all your Questions
A somatic cell that has just completed the S phase of its cell cycle, as compared to gamete of the same species, has:
- Option 1)
twice the number of chromosomes and four times the amount of DNA
- Option 2)
four times the number of chromosomes and twice the amount of DNA
- Option 3)
twice the number of chromosomes and twice the amount of DNA
- Option 4)
same number of chromosomes but twice the amount of DNA
Answers (1)
As discussed in
Phases of Interphase: S Phase (Synthesis) -
Marks the period during which DNA synthesis or replication takes place. During this time, the amount of DNA per cell doubles, but number of chromosomes remain same.
- wherein
During this time, the amount of DNA per cell doubles, but number of chromosomes remain same.
Somatic cells are diploid (2n) as compared to gamites which are haploid (n)
Hence, for somatic cell, after S-phase, chromosome numbers is twice (2n) and amount of DNA is four times (due to duplication)
Option 1)
twice the number of chromosomes and four times the amount of DNA
This is correct answer
Option 2)
four times the number of chromosomes and twice the amount of DNA
This is incorrect answer
Option 3)
twice the number of chromosomes and twice the amount of DNA
This is incorrect answer
Option 4)
same number of chromosomes but twice the amount of DNA
This is incorrect answer
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