Spermatogenesis

 Oogenesis

1. It is the formation of mature male gametes



2. It occurs in testis.

3. All the spermatogonia undergo growth and differentiation to form primary spermatocytes.

4. Meiosis results in the formation of equal cells.

5.Four male gamete or sperms are formed.

6. Spermatozoa are delicate, microscopic metile structures.

1. It is the formation of mature female gametes.

2. It occurs ovary.

3. Many of oogonia fail to form primary oocyte.

4. Meiosis results in the formation of unqual cells .

5. Only one female gamete or ovum is formed.

6. The egg is small rounded structure which is non-motile.