Question

Which of the following correctly represents the sequence of cellular divisions and transformations in spermatogenesis?

Options

• Spermatogonium (2n) → Primary Spermatocyte (2n) → Secondary Spermatocyte (2n) → Spermatid (2n) → Spermatozoon (n)

• Spermatogonium (n) → Primary Spermatocyte (n) → Secondary Spermatocyte (2n) → Spermatid (2n) → Spermatozoon (n)

• Spermatogonium (n) → Primary Spermatocyte (2n) → Secondary Spermatocyte (2n) → Spermatid (n) → Spermatozoon (2n)

• Spermatogonium (2n) → Primary Spermatocyte (2n) → Secondary Spermatocyte (n) → Spermatid (n) → Spermatozoon (n)

Answer 1

The correct sequence is: Spermatogonium (2n) → Primary Spermatocyte (2n) → Secondary Spermatocyte (n) → Spermatid (n) → Spermatozoon (n). Spermatogonia and primary spermatocytes are diploid (2n), while secondary spermatocytes, spermatids, and mature spermatozoa are haploid (n). The transition from diploid to haploid occurs during Meiosis I, and this ploidy is maintained through subsequent divisions and spermiogenesis.