Question

Cell ‘B’, a meiotic product of cell ‘A’ has 16 chromosomes and 30 pg DNA. What would be the chromosomes number and amount of DNA respectively in cell ‘A’ at G2 phase?

Answer 1

Answer:

12

Explanation:

Answer 2

32 chromosomes and 120 pg of DNA

Explanation:

1. A normal meiocyte contains: Ploidy-2n and DNA content- 2C

2. At G₁ phase: ploidy- 2n and DNA content- 2C

3. At S phase: ploidy- 2n and DNA content- 4C (due to DNA replication)

4. At G₂ phase- ploidy- 2n and DNA content- 4C

5. After meiosis II- ploidy-n (reduction division) and DNA content- 1 C (reduction division)

If a cell after meiosis II has 16 chromosomes (n) and DNA content- 30 pg (1C)

We know that at G₂ phase-

(i) Ploidy-2n (16x2= 32 chromosomes)

(ii) DNA content- 4C (30x 4= 120 pg DNA)

Thus, 32 chromosomes and 120 pg of DNA is the correct answer.

To learn more:

1. Meiosis: https://brainly.in/question/4781436

2. DNA replication: https://brainly.in/question/4790481