A cell has 30 chromosomes in G2 phase (sub-phase of interphase) of the cell cycle. What would be the total number of sister chromatids in prophase-I of the same cell?
Correct answer: C. 60
- A. 15
- B. 30
- C. 60
- D. 90
Explanation
Number of chromosomes in G₂ = 30Each chromosome = 2 sister chromatidsSo, total sister chromatids =30 × 2 = 60.So, C is the correct option.
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About Chromosomes
Chromosomes are DNA-protein structures that carry genes and become visible during cell division. Coverage includes chromatin, centromeres, sister chromatids, homologous chromosomes, chromosome number, and the distinction between diploid and haploid cells, with links to DNA replication, mitosis and meiosis.
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