Question

Schematic representation of gametogenesis is given below. Identify A. Write one difference between A and B.

Answer 1

Hint: 1.This helps in the development of the ova in the female.
2.The production of sperm happens in the male testes, especially in the seminiferous tubules.

Complete answer:
First we should know about gametogenesis to answer this question. Gametogenesis is a biological mechanism through which diploid or haploid precursor cells are subjected to division or differentiation of cells to create mature haploid gametes. Gametogenesis happens by the meiotic division in diploid gametocytes into separate gametes or through mitosis, based on the biological life cycle of the organism. Only after fertilisation can the secondary oocyte complete meiosis II. Here a third polar body is being handed off. After Meiosis II, the result is a fertilised egg. If fertilisation does not occur, 24 hours following ovulation, the oocyte degenerates and persists in meiosis II.

Spermatogenesis	Oogenesis
There is no creation of polar bodies.	There is a formation of polar bodies.
An equitable division occurs.	Divisions are unequal.
No yolk is contained in the sperm.	The eggs have yolk.
By this process, significant amounts of sperm are detected.	This process delivers fewer amounts of ovum.

Note: A key aspect of gametogenesis is meiosis, but the adaptive role of meiosis is a matter of controversy at the moment. Pairing homologous chromosomes and recombining (interchange of genetic information) among homologous chromosomes is a crucial occurrence during meiosis.