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The answer is a bit of a 'yes and no', though mostly 'no. The Y chromosome has very few genes, but arguably the most pivotal is the sex-determining region Y or SRY gene, also known as TDF or testis determining factor. The protein this gene codes for acts essentially as a master switch for male phenotypes by triggering the development of testes in the ...


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Yes, having a Y chromosome does cause specific alterations to facial structure. The Y chromosome doesn't contain much actual genetic information. Most of the information needed to activate the male developmental program (the female one is the default) is in just one gene 'SRT', the other genes on the Y chromosome aren't super important, such that you can ...



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