MCAT Biology Question 16: Answer and Explanation
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Question: 16
1. Which of the following is the correct sequence of the development of a mature sperm cell?
- A. Spermatid → spermatocyte → spermatogonium → 2° spermatocyte → spermatozoan
- B. Spermatogonium → 1° spermatocyte → 2° spermatocyte → spermatid → spermatozoan
- C. Spermatozoan → 1° spermatocyte → 2° spermatocyte → spermatogonium → spermatid
- D. Spermatogonium → 1° spermatocyte → 2° spermatocyte → spermatozoan → spermatid
Correct Answer: B
Explanation:
Diploid cells called spermatogonia differentiate into primary spermatocytes, which undergo the first meiotic division to yield two haploid secondary spermatocytes. These undergo a second meiotic division to become immature spermatids. The spermatids then undergo a series of changes leading to the production of mature sperm, or spermatozoa.