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Lecture 10

Lecture Ten - Hormone, Sex & Behaviour.docx

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University of Toronto St. George
Mandy Wintink

Lecture Ten: Hormone, Sex & Behaviour March 24, 2014 6:12 PM Consider: • Sex, Gender, and Sexual Orientation is a continuum, and not just a dichotomy o i.e. MAMAWAWA is false Hormones and Sexual Development of the Body • Dimorphic → two body types • How we respond to our hormones that are being released by our chromosomes • How our brain is sex typed Fetal Hormones and Development of Reproductive Organs: Gonads • If we don't respond to testosterone, we are generally females • Had to respond to testosterone in order to become male • The presence of the protein has to be there and then we respond to it • • Figure 2: Medulla shrinks, and the cortex takes over • Figure 3: Yellow → Mullerian system; both of these are present in the infant; wont know within 6 weeks we will not know whether it is male or female o Testes descend into the scrotum and the yellow tissue would disintigrate if there is testosterone present o If there is no testosterone, the Mullerian system takes over and the Wolffian system takes over o
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