10 - reproductive behavior

10 - reproductive behavior - Sexual Development 18:10...

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Sexual Development 18:10 Sexually dimorphic behaviors: A behavior that has different forms or that occurs  with different probabilities or under different circumstances in males and females Production of Gametes and Fertilization Gametes: A mature reproductive cells o A sperm or ovum Sex chromosomes: The X and Y chromosomes, which determine an  organism’s gender o Normally, XX individuals are female, and XY individuals are male Development of the Sex Organs Gonads o Gonads: Ovary or testis o Organizational effects: The effects of a hormone on tissue differentiation  and development Activational effect: The effect of a hormone that occurs in the fully  developed organism May depend on the organism’s prior exposure to the organizational  effects of hormones Internal Sex Organs o Mullerian system: The embryonic precursors of the female internal sex  organs Wolffian system: The embryonic precursors of the male internal sex  organs o Anti-Mullerian hormone: A peptide secreted by the fetal testes that inhibits  the development of the Mullerian system, which would otherwise become  the female internal sex organs Defeminizing effect: An effect of a hormone present early in  development that reduces or prevents the later development of  anatomical or behavioral characteristics typical of females Androgens: Male sex steroid hormones Testosterone is the principal mammalian androgen Masculinizing effect: An effect of a hormone present early in  development that promotes the later development of anatomical or  behavioral characteristics typical of males  o Testosterone: The principle androgen found in males
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Dihydrotestosterone: An androgen, produced from testosterone  through the action of the enzyme 5 alpha reductase o Androgen insensitivity syndrome: A condition caused by a congenital lack  of functioning androgen receptors In a person with XY sex chromosomes, causes the development of a  female with testes but no internal sex organs o Persistent Mullerian duct syndrome: A condition caused by a congenital  lack of anti-Mullerian hormone or receptors for this hormone
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This note was uploaded on 11/16/2010 for the course PSYC 301 taught by Professor Yager during the Fall '10 term at Maryland.

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10 - reproductive behavior - Sexual Development 18:10...

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