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Question
During spermatogenesis which of the following is the first cell to become haploid?
During spermatogenesis which of the following is the first cell to become haploid?
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Solution
The correct option is B Secondary spermatocyte
The spermatogonia divide mitotically, and some of them undergo two rounds of mitosis to form 4 primary spermatocytes, each of which undergoes meiosis to produce 2 haploid secondary spermatocytes. Each secondary spermatocyte then undergoes mitosis to produce 2 spermatids. So the first cell to become haploid is the secondary spermatocyte.
Cell type Ploidy
Spermatogonia diploid
Primary spermatocyte diploid
Secondary spermatocytes haploid
Spermatids haploid
Secondary spermatocyte
The spermatogonia divide mitotically, and some of them undergo two rounds of mitosis to form 4 primary spermatocytes, each of which undergoes meiosis to produce 2 haploid secondary spermatocytes. Each secondary spermatocyte then undergoes mitosis to produce 2 spermatids. So the first cell to become haploid is the secondary spermatocyte.
Cell type Ploidy
Spermatogonia diploid
Primary spermatocyte diploid
Secondary spermatocytes haploid
Spermatids haploid
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