Forty sperm are made by the end of spermatogenesis. How many spermatogonium entered meiosis?
A - 8
B - 10
C - 4
D - 20
E - 1
Answer: B - 10
SPERMATOGOIUM are the first precursor cells, it turns into a primary spermatocyte when it enters mitosis, which divides into two secondary spermatocytes. These will then divide creating four.