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Name: Erosie
Status: Other
Grade:  Other
Location: PA
Country: United States
Date: May 2005

What is the mechanism which usually results in male anatomy when X and Y are present?

There is a gene or genes in the so-called SRY region of the Y chromosome that code for a protein or proteins that stimulate the development of the testes. Even in the presence of 4 X xhromosome (XXXXY), testes will still develp, so the SRY protein(s) is/are potent. SRY stands for "sex-determining region Y"

Ron Baker, Ph.D..

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