Do all cells in the testis go through meiosis at the same time? Why or Why not?

Answer 1

Spermatocytogenesis and Meiosis

1. Spermatogonia divide

a. Located near outer surface of seminiferous tubule

b. Originate at puberty

c. One or two divisions of spermatogonia occur to maintain their population in a stem cell pool (type A spermatogonia)

d. These divisions are mitotic

e. Spermatogonia proliferate several times and undergo 1 to 5 stages of division and differentiation

f. After the last division, the resulting cells are termed primary spermatocytes

2. The primary spermatocytes then undergo the first of the two divisions that constitute meiosis
a. The first meiotic division produces two secondary spermatocytes

b. Division of the secondary spermatocytes completes meiosis and produces the spermatids

3. Stem cell spermatogonia remain dormant for a time and then join a new proliferation of spermatogonia

a. This new wave of spermatogonial divisions does not wait for the previous generation of cells to complete spermatogenesis

i. The purpose of this phenomenon is to ensure a residual population of spermatogonia

b. The time required for one spermatogonium to divide and form spermatozoa requires about 4.5 to 5 times that time span between divisions of the stem cell spermatogonia

Answer 2

no.i think so