Gametogenesis

Gametogenesis - Bi Sci 001 Wednesday Announcements Lecture...

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Bi Sci 001 Wednesday March 24, 1999 Announcements: Lecture notes: Gametogenesis Gametogenesis includes both gamete formation and meiosis. Gametogenesis means formation of gametes. In males it is called spermatogenesis In females, it is called oogenesis. Both of these processes are under hormonal control. Both occur in the gonads: The ovary in females, the testis in males. Results: haploid gametes sperm and egg. Spermatogenesis The "Germ cell" is called a spermatogonium (diploid) is located in the wall of the seminiferous tubule in the testis. (About 140 yards of tubule in each testis). Male primates produce sperm continuously after puberty. Spermatogonia become activated and divide by mitosis to become primary spermatocytes. (Still diploid) Meiosis I occurs to form secondary spermatocytes (haploid with duplicated DNA) Meiosis II occurs to form spermatids (haploid unduplicated DNA) The process by which spermatids become sperm (mature and mobile) is called spermiogensis.
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Oogenesis Oogenesis occurs in the ovaries. "Germ cell" is the oogonium (diploid)
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This note was uploaded on 02/21/2008 for the course BI SC 001 taught by Professor Schlegel during the Spring '99 term at Penn State.

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Gametogenesis - Bi Sci 001 Wednesday Announcements Lecture...

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