Question

What is spermatogenesis? Explain with the help of diagram.

Answer 1

The formation of sperms in testis is called as spermatogenesis. It involves the following steps:
(1) Multiplication phase: In this phase, the cells of the generative layer known as germ cells divide and redivide through mitosis to produce spermatogonia.
(2) Growth phase: In this phase, spermatogonia grow in size, and now it is known as Primary spermatocytes.
(3) Maturation phase: In this phase primary spermatocyte divides by meiosis to produce four haploid spermatids.

(4) Spermiogenesis: In this phase, spermatids undergo metamorphosis to produce a well-developed sperm which is divided into three parts: (i) Head, (ii) Neck, and (iii) Tail.