Question

In humans, at the end of the first meiotic division, the male germ cell differentiate into the

• A. spermatids
• B. spermatogonia
• C. primary spermatocyte
• D. secondary spermatocyte

Answer 1

The correct option is D secondary spermatocyte

The process of formation of haploid gametes from the undifferentiated diploid germ cells in the gonads, for sexual reproduction, is called gametogenesis.
The process of formation of male gamete i.e., sperm in the seminiferous tubules of the testis is known as spermatogenesis. This process includes multiplication, growth and maturation phase.
Primordial germ cells undergo repeated mitotic divisions and produce a large number of spermatogonia (2n).
Some spermatogonia stop dividing and grow in size by accumulating cytoplasm and replicating DNA, which makes them double in size to spermatogonia and are then termed as primary spermatocytes (2n).
Each primary spermatocyte (diploid) undergo two successive maturation divisions. In the first reductional division i.e., meiosis-I occurs wherein the primary spermatocytes (2n) gets reduced to two haploid secondary spermatocytes (n).
These secondary spermatocytes (n) undergo a quick second round of equational division i.e., meiosis-II producing four haploid spermatids (n). Finally, by the process of spermiogenesis, these haploid spermatids transform into spermatozoa.