Prenatal Hormone Exposure and Sexual Variation

Hormone exposure in the womb is instrumental in shaping the sexual anatomy, physiology and behavior of mammals

Biology Anatomy Animal Behavior Physiology Reproduction

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This Article From Issue

May-June 2003

Volume 91, Number 3
Page 218

DOI: 10.1511/2003.44.218

How is an individual's sex determined? In high school biology class you probably learned a basic rule for mammals: Individuals with one X and one Y chromosome develop into males. Those with two X's develop into females. Distinguishing between the resulting males and females should be straightforward. Unfortunately for those who like simple rules, the story is far more complex.

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