What is the X chromosome?In most individuals with 46,XX testicular disorder of sex development, the condition results from an abnormal exchange of genetic material between chromosomes (translocation). This exchange occurs as a random event during the formation of sperm cells in the affected person's father. The translocation affects the gene responsible for development of a fetus into a male (the SRY gene). The SRY gene, which is normally found on the Y chromosome, is misplaced in this disorder, almost always onto an X chromosome. A fetus with an X chromosome that carries the SRY gene will develop as a male despite not having a Y chromosome.
As you can see here some people may not even HAVE a Y (male) chromosome, and yet are still physically male. What this also shows though is that everyone does have a X (female) chromosome.
Now what is also generally known is that gene's have varying strengths. Some are more dominant and others are not and some are just plain inactive. IE: It's not such a black and white topic of one gene being the end all be all of a genetic string. There are a million plus genetic variations that make up the human genome all by itself. Indeed, as my article shows the X chromosome just by itself spans 155 million dna building blocks.
So faced with this, are you really so sure that it is as simple as XY = Male PERIOD and XX = Female PERIOD? Do you see how I came to write what I did in my post #47?