Spermatogenesis

Question 1

Multiplication phase

Answer 1

Primordial germ cells of embryonic testes divide by mitosis and differentitate into spermatogonial stem cells . Spermatogonial stem cells divide mitotically and undergo differentiate to form spermatogonia (2n)

Question 2

Growth phase

Answer 2

Spermatogonia then divide by mitosis and differentiate into primary spermatocycte (2n) . Some spermatogonial stem cell divide but remain as stem cell .

Question 3

Maturation phase

Answer 3

Primary spermatocyte undergoes and complete meiosis I . Secondary spermatocytes undergoes meiosis II . Spermatids differentiate . The stage of spermatogenesis which the spermatids differentiate into mature spermatozoa is known as spermiogenesis l Spermatozoa released into the lumen of seminiferous tubule .