Lec11 02_08_08 Sex determination

Lec11 02_08_08 Sex determination - Lecture 11. Sex...

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Lecture 11. Sex determination and sexual behavior February 7, 2007 See Chapters 7 and 8 in Cheung, Fundamental Concepts in Biology Outline Gender identity and sexual orientation Sex determination in the biological world Why does mate choice exist? How does mate choice lead to sexual selection?
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Gender and Sport
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Summary of sex determination in humans SRY gene Number of sex chromosomes Androgen (testosterone) synthesis in testes Androgen receptors Other sources of androgens (adrenal)
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Androgen effects later in life: Female Body Builders
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Biological Effects of Estradiol and Testosterone Characteristics Estradiol Testosterone Source Ovaries, adrenal gland, breast Testes, adrenal gland Primary Sexual Characteristics Development of female internal and external genitalia Development of male internal and external genitalia Secondary Sexual Characteristics Promotes breast development Fat distribution -- forms hour- glass body shape Accelerates epiphysis closure in bone (stops growth spurt)
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This note was uploaded on 05/01/2008 for the course BSC 1005 taught by Professor Brist during the Spring '08 term at University of Central Florida.

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Lec11 02_08_08 Sex determination - Lecture 11. Sex...

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