Sexual Differentiation Lesson

Sexual Differentiation Lesson - female by default BUThow...

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    Last Week in…. We discussed the different forms of Reproduction We discussed the costs/benefits of each form This week we’ll discuss sexual differentiation - how sexually reproducing organisms develop into separate sexes. Specifically, as it applies to us humans
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SO…How Do We Get From… Here… T o h e r OR ? (essentially a clump of undifferentiated cells) (fully developed adult female) (fully developed adult male)
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In other words, How do our bodies know if we are meant to use the little boys’ room or the little girls’ room? It’s the factor!
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The Y chromosome contains a gene known as the SRY ( s ex determining r egion on the Y chromosome) gene. This gene is responsible for the development of testes But what about the factor?
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Everyone develops an area known as the urogenital ridge Unless testes develop, this area will naturally develop into the female reproductive system In other words, we are all
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Unformatted text preview: female by default BUThow does this happen?? When testes form they release 2 hormones - testosterone & MIS ( m ullerian i nhibiting s ubstance) The testosterone causes the male reproductive system to develop MIS causes the ducts of the female system to degenerate Testosterone & MIS Codes for formation of produces Leads to development of mature male reproductive system testes SRY gene on the Y Chromosome leads to the natural development of the Female reproductive organs produces Estrogen & Progesterone leads to development of mature female reproductive system This powerpoint was kindly donated to www.worldofteaching.com http://www.worldofteaching.com is home to over a thousand powerpoints submitted by teachers. This is a completely free site and requires no registration. Please visit and I hope it will help in your teaching....
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Sexual Differentiation Lesson - female by default BUThow...

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