Question

Select a correct pair of cells with identical set of chromosomes.

• A. Secondary oocyte and spermatid.
• B. First polar body and primary spermatocyte.
• C. \(2^{nd}\) polar body and primary oocyte.
• D. Secondary spermatocyte and spermatogonia.

Hint:

Find the pair in which both cells are haploid (or both are diploid).

Answer 1

The Correct Option is A

Step 1: Understanding the Concept
Chromosome numbers in gametogenesis are: spermatogonium 2n, primary spermatocyte 2n, secondary spermatocyte n, spermatid n, oogonium 2n, primary oocyte 2n, secondary oocyte n, polar bodies n.

Step 2: Check each pair
Secondary oocyte (n) and spermatid (n) are both haploid. First polar body (n) with primary spermatocyte (2n), second polar body (n) with primary oocyte (2n), and secondary spermatocyte (n) with spermatogonia (2n) are not identical.

Step 3: Result
Only the first pair has the same chromosome set.

Final Answer:
Secondary oocyte and spermatid have identical chromosome sets. \[ \boxed{\text{(A) }\text{Secondary oocyte and spermatid.}} \]