Gametogenesis - Meiosis I, Meiosis II, and the maturation...

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Gametogenesis Gametogenesis is the formation of gametes. The formation of eggs is oogenesis and the formation of sperm is spermatogenesis . In animals, gametes are formed by meiosis. Spermatogenesis Spermatogenesis occurs in seminiferous tubules in testes. The cell that undergoes meiosis is a primary spermatocyte . The first meiotic division produces two secondary spermatocytes and the second division produces spermatids , which mature to form sperm.
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Unformatted text preview: Meiosis I, Meiosis II, and the maturation process each take approximately 16 days (48 days total). Males do not run out of sperm because mitosis precedes each meiosis. The diagram above shows that a spermatogonium divides by mitosis to produce a primary spermatocytes and a spermatogonium. Human males produce approximately1000 sperm per second (30 billion/year). Each ejaculation should contain 200 - 300 million sperm....
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Gametogenesis - Meiosis I, Meiosis II, and the maturation...

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