Question

1. which of the diagrams below most closely represents oogensis (1) (2) (3) (4)

Explanation:

Step1: Analyze the concept of meiosis

Meiosis is a type of cell division that reduces the chromosome number by half, producing four haploid cells. The initial cell is diploid (2n), then it divides into two cells with n chromosomes, and then each of those divides into two cells with n chromosomes (total four haploid cells).

Step2: Evaluate each diagram

• Diagram (1): Starts with 2n and produces two 2n cells, which is mitosis, not meiosis.
• Diagram (2): Starts with 2n, divides into two n cells, then each n cell divides into two n cells (total four n cells). This matches the process of meiosis (reduction from 2n to n, then division of n cells to produce four haploid cells).
• Diagram (3): Starts with 2n and produces four cells, but the representation doesn't show the reduction to n first.
• Diagram (4): The initial division produces cells with different labels (n and r), which is not consistent with meiosis.

Answer:

(2)