Differentiation between oocyte and spermatogenesis
Answers
Spermatogenesis is the process by which haploid spermatozoa develop from germ cells in the seminiferous tubules of the testis. This process starts with the mitotic division of the stem cells located close to the basement membrane of the tubules. These cells are called spermatogonial stem cells. The mitotic division of these produces two types of cells. Type A cells replenish the stem cells, and type B cells differentiate into spermatocytes. The primary spermatocyte divides meiotically (Meiosis I) into two secondary spermatocytes; each secondary spermatocytes divides into two equal haploid spermatids by Meiosis II. The spermatids are transformed into spermatozoa(sperm) by the process of spermiogenesis. These develop into mature spermatozoa, also known as sperm cells.[1] Thus, the primary spermatocyte gives rise to two cells, the secondary spermatocytes, and the two secondary spermatocytes by their subdivision produce four spermatozoa and four haploid cells.
Explanation:
The main difference between Spermatocytes and Oocytes are as follows
SPERMATOCYTES OOCYTES
1. Primary spermatocytes are formed from the spermatogonia in the seminiferous tubules of testes by mitosis.
Primary oocytes are formed from the oogonia in the ovary of the foetus.
2. Each primary spermatocyte undergoes meiosis I and forms the two haploid secondary spermatocytes.
Each primary oocyte undergoes meiosis I and forms haploid secondary oocytes and haploid first polar body.
3. Each secondary spermatocyte undergoes meiosis II and forms two haploid spermatids.
The secondary oocyte undergoes meiosis II and forms one ovum and one second polar body.
4. Each primary spermatocyte forms four haploid spermatids.
Each primary oocyte forms one ovum and three polar bodies.