Somatic cells of lions contain 36 chromosomes How many chrom

Somatic cells of lions contain 36 chromosomes. How many chromosomes and how many molecules of DNA present in each of the following stages of cell division? Explain your rationale for G2 phase:

Solution

At G1 phase of cell cycle:

No of Chromosomes = 36

No of DNA = 36

At G2 phase of cell cycle:

No of Chromosomes = 36

No of DNA = 72

At anaphase of mitosis:

No of Chromosomes = 72

No of DNA = 72

At anaphase-I of meiosis:

No of Chromosomes = 72

No of DNA = 72

At anaphase-II of meiosis:

No of Chromosomes = 36

No of DNA = 36

Explain for G2 phase:

In S phase DNA replicate, so number of DNA molecules G2 phase is 72 but number of chromosome G2 phase 36 due to, two DNA molecules are held at a common centromere

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