Question

Spermiogenesis/ Spermateleosis is formation of spermatozoa from
A. Primary spermatocyte
B. Secondary spermatocyte
C. Spermatids
D. Germinal cells of testes

Answer 1

Hint: Spermatogenesis is the production and growth of sperm cells within the male reproductive organs, the testes. The testes are made up of several thin, tightly coiled tubules called seminiferous tubules, which generate sperm cells within their walls. Spermatogenesis involves meiotic divisions of spermatocytes to produce haploid sperm cells.

Complete answer:
Let us solve this question by analyzing each option in relation to the process of spermatogenesis.
Option:A – In animals, spermatocytes are a kind of male gametocyte. They come from spermatogonia, which are immature germ cells and this process is called spermatocytogenesis. Spermatozoa are not directly produced from spermatocytes
So, Option:A is incorrect.
Option:B – Primary spermatocytes give rise to secondary spermatocytes through the process of spermatocytogenesis which produce spermatids.
So, Option:B is incorrect.
Option:C – The production of spermatozoa from spermatids is known as spermiogenesis/ spermateleosis. It's the final step of the spermatogenesis process. It starts in the testes and happens throughout puberty. The sperm heads get lodged in the Sertoli cells after spermiogenesis and are eventually liberated from the seminiferous tubules via spermiation.
So, Option:C is correct.
Option:D – Germinal cells of testes are present since birth and do not give rise to spermatozoa.
So, Option:D is also incorrect.

Therefore, we can say that option C. Spermatids is the correct answer.

Note:
The four primary phases of spermiogenesis are the Golgi phase, cap phase, tail phase, and maturation phase. The whole spermatogenesis process, including spermiogenesis, takes place in the testes' coiled tubules known as seminiferous tubules. During spermiogenesis, non-motile spermatozoa depart the seminiferous tubule and travel to the epididymis, where they become motile and are stored for use in fertilization.