07 -- 402_S2009_Reproductive Behaviors exercise

07 -- 402_S2009_Reproductive Behaviors exercise - 1. What...

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1. What are the CLASSES of steroid hormones which are involved with  reproduction/sexual behavior and what are specific EXAMPLES of those hormones? -Androgens: testosterone/dihydrotestosterone -Estrogens: estradiol -Gestogen: progesterone 2. Explain why it is true that the father’s genetic contribution determines the sex of the  child?   -father gives either X or Y (Sry [sex-determining region of Y] gene) chromosome 3. What hormone(s) determine whether the male or female ductal system will develop? Anti-Mullerian hormone (effeminizing effect) and androgens  (testosterone/dihydotestosterone for masculanizing effects) -Mullerian system doesn’t need hormonal stimulation. More males conceived than females, but don’t all make it; slightly more females born. 4. What hormone(s) determine whether the male or female external genitalia develop? -dihydrotestosterone for males -nothing for females 5. What part of the primordial gonads eventually becomes the testes?  ovaries? Medulla of undifferentiated become testes; cortex of undifferentiated become ovaries
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6. What is androgen insensitivity syndrome and what are the consequences: what does  the external  genitalia look like?  what has happened to the ductal systems?  will the person be sterile  or fertile?  is the brain masculinized/defeminized or feminized?  Also, ask me about the  children who grow a penis.  -external female genitalia, but no ductal system; no androgen receptors -no testosterone (so no penis) -neither ductal system because still have anti-Mullarian hormone -defeminized by anti-Mullarian, but brain not masculanized by testosterone -guevodoces (sp?) don’t grow penis until puberty -dihydrotestosterone not effective -puberty hormone is effective 7. What is the persistent m llerian duct syndrome and what are the consequences: what ϋ   does the external genitalia look like?  what has happened to the ductal system?  will the  person be sterile or fertile?  is the brain masculinized/defeminized or feminized? -have testosterone present, but mullarian system also developes since no antimullerian  hormone -both sets -person’s sometime’s sterile -depends on how much Mullerian interference on Wolfian (less interference =  fertile) -issue of where testes are; if don’t properly descend, too warm to be fertile -brain is masculanized due to testosterone
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8. What is Turner’s syndrome and what are the consequences: what does the external  genitalia look like?  what has happened to the ductal system?  will the person be sterile  or fertile?  is the brain masculinized/defeminized or feminized? -Turn syndrome = X0; normal female organs (default). Overies don’t develop because 
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This note was uploaded on 03/23/2009 for the course PSYC 402 taught by Professor Jenniloeb during the Spring '09 term at UNC.

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07 -- 402_S2009_Reproductive Behaviors exercise - 1. What...

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