Question

Given the following groups, select the option that has all haploid cells.

• A. Primary oocyte, secondary oocyte, spermatid
• B. Primary oocyte, secondary oocyte, second polar body
• C. Oogonia, primary spermatocyte, spermatid
• D. Secondary spermatocyte, first polar body, ovum

Answer 1

The correct option is D Secondary spermatocyte, first polar body, ovum

Gametogenesis is a complex and multistep process of forming mature haploid gametes, during which many structures are formed from precursor cells (germ cells).

Secondary spermatocytes, the first polar body during the process of gametogenesis are formed after meiosis I division whereas the ovum is formed after meiosis II. Thus all the structures are haploid.

Primary structure (primary oocyte and spermatocyte) formed during the multiplication phase are formed due to mitosis of primordial germ cells. Thus they are diploid.