What is spermatogenesis? Briefly describe the process of spermatogenesis.
Solution and Explanation
Spermatogenesis is the process of the production of sperms from the immature germ cells in males. It takes place in seminiferous tubules present inside the testes. During spermatogenesis, a diploid spermatogonium (male germ cell) increases its size to form a diploid primary spermatocyte. This diploid primary spermatocyte undergoes first meiotic division (meiosis I), which is a reductional division to form two equal haploid secondary spermatocytes. Each secondary spermatocyte then undergoes second meiotic division (meiosis II) to form two equal haploid spermatids. Hence, a diploid spermatogonium produces four haploid spermatids. These spermatids are transformed into spermatozoa (sperm) by the process called spermiogenesis.
Top Questions on Human Reproduction
- The following statements are associated with human female reproductive physiology.
A. The uterine cycle during menstruation includes follicular phase, ovulation and luteal phase.
B. The degeneration of corpus luteum is called luteolysis.
C. An increase in plasma progestrone level synchronises with the luteal phase.
D. After oocyte matuaration, ovulation takes place.
Choose the correct answer from the options given below :- CUET (PG) - 2023
- Zoology
- Human Reproduction
- The fluids secreted from seminal vesicles, prostate gland and Cowper's gland collectively called seminal plasma. The seminal plasma along with sperm is called _____ .
- TS POLYCET - 2022
- Biology
- Human Reproduction
- The body of the ovule is fused within the funicle at :
- NEET (UG) - 2020
- Biology
- Human Reproduction
- Select the correct sequence for transport of sperm cells in male reproductive system.
- NEET (UG) - 2019
- Biology
- Human Reproduction
- Select the hormone-releasing Intra-Uterine Devices.
- NEET (UG) - 2019
- Biology
- Human Reproduction
Questions Asked in CBSE CLASS XII exam
- Find the inverse of each of the matrices,if it exists \(\begin{bmatrix} 2 & 1 \\ 7 & 4 \end{bmatrix}\)
- For what values of x,\(\begin{bmatrix} 1 & 2 & 1 \end{bmatrix}\)\(\begin{bmatrix} 1 & 2 & 0\\ 2 & 0 & 1 \\1&0&2 \end{bmatrix}\)\(\begin{bmatrix} 0 \\2\\x\end{bmatrix}\)=O?
What is the Planning Process?
- CBSE CLASS XII - 2023
- Planning process steps
- Find the inverse of each of the matrices,if it exists. \(\begin{bmatrix} 2 & 3\\ 5 & 7 \end{bmatrix}\)
- Find the inverse of each of the matrices, if it exists. \(\begin{bmatrix} 1 & 3\\ 2 & 7\end{bmatrix}\)
Concepts Used:
Gametogenesis
The gametogenesis process includes the formation of reproductive cells or sex cells in living organisms. In plants, it is carried throughout mitosis whereas, in animals, it is carried through meiosis. The formation of male and female gametes are the two basic steps that take place during the gametogenesis process.
Based on the living organism, the process of gametogenesis occurs in:-
Plants: It occurs by the meiotic division of diploid gametocytes. In higher plants, it happens along with sporogenesis.
Animals: It occurs by meiosis where gametes are formed from their diploid mother cells exist in organs called gonads.
Stages of Gametogenesis
The gametogenesis process occurs in three steps. They are as follows;
- Mitotic divisions together with cell growth of precursor germ cells.
- The happening of Meiosis I and Meiosis II for producing haploid daughter cells.
- Metamorphose haploid daughter cells for the production of functional gametes.
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