Description:
The presence of the Y chromosome triggers a human embryo to become male. Dr. David Page describes how the Y chromosome was once very much like every other gene-filled chromosome, but in the course of vertebrate evolution has lost almost every function except making males.
Speaker(s):
David C. Page, M.D., HHMI investigator; professor of biology; member, the Whitehead Institute for Biomedical Research, Massachusetts Institute of Technology
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