Question

Differentiate between oogenesis and spermatogenesis on the following basis:
(a) Number of products
(b) Gonadal hormones

Hint:

Spermatogenesis is a continuous process starting at puberty, whereas oogenesis is a discontinuous process that starts before birth and ends at menopause.

Answer 1

Step 1: Understanding the Concept:
Spermatogenesis and Oogenesis are the two types of gametogenesis in humans, producing male and female gametes respectively. They differ significantly in their timing, output, and hormonal control.

Step 2: Detailed Explanation:
(a) Number of products:
- Spermatogenesis: One primary spermatocyte undergoes two meiotic divisions to produce four equal-sized functional haploid spermatozoa.
- Oogenesis: One primary oocyte undergoes two unequal meiotic divisions to produce only one functional haploid ovum and two or three non-functional polar bodies that eventually degenerate.

(b) Gonadal hormones:
- Spermatogenesis: It is primarily regulated by androgens, specifically testosterone, secreted by Leydig cells under the influence of LH (Luteinizing Hormone).
- Oogenesis: It is primarily regulated by estrogens and progesterone secreted by the follicles and the corpus luteum in the ovary.

Step 3: Final Answer:
The processes differ in output (4 vs 1) and primary regulatory hormones (Testosterone vs Estrogen/Progesterone).