Practicing Success

Target Exam

CUET

Subject

Biology

Chapter

Human Reproduction

Question:

Spermiation is the_________________.

Options:

Process of release of sperms from the seminiferous tubules

Process of formation of sperms

Transformation of spermatids into sperms

Process of formation of spermatogonia

Correct Answer:

Process of release of sperms from the seminiferous tubules

Explanation:

The correct answer is Option (1)- Process of release of sperms from the seminiferous tubules

In testis, the immature male germ cells (spermatogonia) produce sperms by spermatogenesis that begins at puberty. The spermatogonia (sing. spermatogonium) present on the inside wall of seminiferous tubules multiply by mitotic division and increase in numbers.

Each spermatogonium is diploid and contains 46 chromosomes. Some of the spermatogonia called primary spermatocytes periodically undergo meiosis.

A primary spermatocyte completes the first meiotic division (reduction division) leading to formation of two equal, haploid cells called secondary spermatocytes, which have only 23 chromosomes each.

The secondary spermatocytes undergo the second meiotic division to produce four equal, haploid spermatids .

The spermatids are transformed into spermatozoa (sperms) by the process called spermiogenesis.

After spermiogenesis, sperm heads become embedded in the Sertoli cells, and are finally released from the seminiferous tubules by the process called spermiation.