NEETBotanyCell Cycle and Cell Division
A diploid cell in the G ₁ phase of its cell cycle has 14 chromosomes and a DNA content of 2 C . Match the stages of the cell cycle in List-I with the corresponding number of chromosomes and DNA content in the cell in List-II. List-I List-II (A) G ₂ phase (i) 14 chromosomes, 2 C DNA (B) Anaphase of mitosis (ii) 14 chromosomes, 4 C DNA (C) Daughter cell after cytokinesis (iii) 28 chromosomes, 4 C DNA Choose the correct
Options
- A(A)-(iii), (B)-(ii), (C)-(i)
- B(A)-(ii), (B)-(i), (C)-(iii)
- C(A)-(iii), (B)-(i), (C)-(ii)
- D(A)-(ii), (B)-(iii), (C)-(i)
Correct answer
D. (A)-(ii), (B)-(iii), (C)-(i)
Step-by-step solution
In the G ₁ phase, the cell has 14 chromosomes and 2 C DNA. During the S phase, DNA replication occurs, doubling the DNA content to 4 C . However, the chromosome number remains the same because the sister chromatids are attached at a single centromere. Thus, in the G ₂ phase, the cell has 14 chromosomes and 4 C DNA. This matches (A) with (ii). During anaphase of mitosis, the centromeres split and sister chromatids separate. Each chromatid is now considered an individual chromosome. This temporarily doubles the chrom