Question

How many chromosomes are present in secondary spermatocyte?

A) 22 Pairs

B) 23

C) 23 Pairs

D) 46

Answer 1

Answer is Option B. 23.

Explanation:

The primary s_per_matocytes and the spermatogonia each contain 46 chromosomes whereas the sper_matids and the secondary spe_rmatocytes each contain 23 chromosomes.

Diploid cells (2n) have 46 chromosomes whereas haploid cells (n) have 23 chromosomes.

Primary s_perm_atocytes (2n) undergo meiosis I to form secondary s_permatocytes (n) which after meiosis II become sper_matids (n). Sper_matids then give rise to spe_rmatazoa by spe_rmiogenesis.

Hence, secondary spe_rmatocytes being haploid cells have 23 chromosomes.