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
Ron Baker, Ph.D..
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Update: June 2012