Reproduction and Gametogenesis

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Reproduction and Gametogenesis
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Reproduction outline

• In utero gender determination differences
• Role of sex chromosomes
• Barr Bodies
• sry gene
• Male reproductive structures and function
• Hormonal control of spermatogenesis
• Female reproductive structures and function
• Hormonal control of oogenesis and ovulation
• Methods of birth control

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How it all begins
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Will a zygote develop into a male vs female
embryo?
It depends upon
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Do you have the SRY GENE?
Testis Determination Factor
(protein)
Binds to DNA and Gonad Differentiation
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FEMALESNO SRY GENE!
I dont have an SRY gene.
NO!
Testis Determination Factor
NO
Binds to DNA and Gonad Differentiation
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Testosterone and DHT
Wolffian ducts change
Epididymis, vas deferns, seminal vesicals!
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Testosterone and NO DHT
Pseudohermaphrodites
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Pseudohermaphodite
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Male Reproduction and Spermatogenesis
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Testis
epididymis
TESTIS
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Testis
64 days
12 more days
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Sertoli Cells and Spermatogeneis
Same as interstitial cells
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Overview
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Mature sperm
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Male Hormonal Control
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Nerve Control of Erection
200,000,000 sperm!!
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Onto Female Reproduction