Chapt27 v0804 Male Reproduction

Chapt27 v0804 Male Reproduction - Chapter 27 The Male...

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1 Chapter 27 The Male Reproductive System Introduction- Reproductive System (No Fairy Tales, Just the Birds and the Bees) Male Reproduction
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2 Of Gametes, Gonads and Gynecology Sexual reproduction is the way we produce kids Two gametes, or germ cells, come together in the great even called fertilization. Male gamete is the _______, female gamete is the _______ (secondary oocyte) Gonads : testicles in male and ovaries in female Gynecology - branch of medicine that studies and treats the female neither region
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3 Our cells contain 23 pairs of chromosomes 22 pairs of autosomes 1 pair of sex chromosomes (XY males: XX females) males produce 50% Y carrying sperm and 50% X carrying all eggs carry the X chromosome Sex of the child is determined by the ___ Role of the Sex Chromosomes
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4 Sex Differentiation We all start off as __________ SRY gene ( S ex-determining R egion of Y gene) Secondary sex characteristics- develop at puberty to attract a mate pubic, axillary & facial hair, scent glands, body morphology and low- pitched voice in males Male Female
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5 Development of External Genitalia Male Female 10 week 10 week 12 week 12 week
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6 Descent of the Testes Begin development near the kidney 3% of boys are born with an undescended testes
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Chapt27 v0804 Male Reproduction - Chapter 27 The Male...

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