In a certain male individual, primary spermatocytes do not divide into secondary spermatocytes, yet between still undergo spermiogenesis and form mature sperm. These sperm then fertilize a normal oocyte. How many chromosomes will the zygote contain?
A) 0 chromosomes
B) 23 chromosomes
C) 36 chromosomes
D) 46 chromosomes
E) 69 chromosomes

Question

Quizplus · Accepted Answer

If primary spermatocytes do not divide into secondary spermatocytes, they retain the diploid number of chromosomes (46). If these cells undergo spermiogenesis without proper division, the resulting sperm will have 46 chromosomes. When such a sperm fertilizes a normal oocyte (which has 23 chromosomes), the resulting zygote will have 69 chromosomes.

In a Certain Male Individual, Primary Spermatocytes Do Not Divide