Question

Write two differences between spermatogenesis and oogenesis.

Answer 1

Gametogenesis is the process of gamete formation in sexually reproducing animals. Gametogenesis is of two types - spermatogenesis and oogenesis.

Complete answer:

The male gamete is known as sperm and the process of sperm production is known as spermatogenesis. The process of spermatogenesis occurs in the gonad of the testis.
The female gamete is known as ovum and the process of ovum production is known as oogenesis. The process of oogenesis occurs in the cells of the germinal epithelium of the ovary, such cells are known as primordial germinal cells.

Spermatogenesis	Oogenesis
The process by which sperms are produced from spermatogonia is known as spermatogenesis	The process by which ova is produced from oogonia is known as oogenesis
The process occurs in testes	The process occurs inside the ovary
It is a continuous process, i.e. it occurs throughout the life	It is a discontinuous process as the early stages occur in foetus and the rest occurs in later stage of life
It leads to production of motile gametes	It leads to production of non-motile gametes
All the stages of spermatogenesis are completed in the testes	all stages of oogenesis does not occur in the ovary as the last few stages happen in the oviduct
During the process, equal cytokinesis occurs resulting in production of 4 sperms	During, the process unequal cytokinesis occurs and results in only one ovum in the end

Note: The similarities between oogenesis and spermatogenesis is that,

They both result in formation of gametes - sperms in males and egg in females.
They both occur in three stages.
They both occur inside gonads - Testes in males and ovary in females.