Peter Attia· MD
So, so I remember my overly simplistic and this is almost 30 years ago, but I could have sworn I used to think about this in the embryology class as by default we are female and this gene had to turn on to basically take the X-wise and make them male phenotypically. But that's obviously oversimplified. >> Yes. So, in some ways that is true. Uh I would not put it that way be but by default you the individual will develop say female >> because if you have an XY that is missing that region you will be phenotypically female but chromosomally male.