Sponsor Area

Human Reproduction

Question
CBSEENBI12002667

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

  • Primary spermatocytes

  • Secondary spermatocytes

  • spermatids

  • spermatogonia

Solution

B.

Secondary spermatocytes

At sexual maturity, the germ cells in human male divide several times by mitosis to produce a large number of spermatogonia. In the growth phase, each spermatogonium actively grows to a larger primary spermatocyte by obtaining nourishment from the nursing cells. In maturation phase, each primary spermatocyte undergoes two successive division called maturation divisions. The primary spermatocyte undergoes first maturation division (meiotic) to producing tow haploid daughter cells called secondary spermatocytes undergo second maturation division to form four haploid spermatids. The transformation of spermatids into spermatozoa is called spermiogenesis or spermateliosis.