Number of Spermatozoa from One Spermatogonium

One spermatogonium produces how many spermatozoa?

Correct Answer: 64

One spermatogonium undergoes multiple mitotic divisions followed by meiosis to ultimately produce 64 spermatozoa.

Steps of Spermatogenesis

• 1 Spermatogonium → 16 Primary spermatocytes (4 mitotic divisions = 2⁴ = 16)
• 16 Primary spermatocytes → 32 Secondary spermatocytes (Meiosis I)
• 32 Secondary spermatocytes → 64 Spermatids (Meiosis II)
• 64 Spermatids → 64 Spermatozoa (spermiogenesis — morphological maturation)

Summary Formula

• 1 Spermatogonium → 16 Primary spermatocytes → 64 spermatozoa
• 1 Primary spermatocyte → 4 spermatozoa
• 1 Primary oocyte → 1 ovum (rest become polar bodies)