Dear Mel,
I take your point about the theory of evolution. I'm glad that there is another scientist out there who does not swallow the theory as complete fact (like so many do). Sorry that I guessed wrong about your viewpoint.
On the issue of X and Y chromosomes and making boys or girls, I checked with a medical student friend of mine, and although her understanding is not perfect on this subject, she assures me that it is a case of the effects of the Y chromosome kicking in later on.
Andrew
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