Reine. Even what you've stated above is oversimplified.
About 30 years ago, my wife and i were having problems conceiving a child, or at least conceiving one that would live to term. Over a two year period, my wife had 4 confirmed 2nd trimester miscarriages and maybe a few 1st trimester miscarriages that were less obvious. With each miscarriage, more medical resources were applied to understand what the problem was, and each time, more medical tests were performed.
Eventually, it got to be my turn to be tested. I underwent a chromosomal analysis, and 50 cells were analyzed. It turned out that 48 of the 50 samples were XY and the other 2 were XX. I was called “mosaicked”, meaning not all cells were created the same. So, officially, I’m 96% male and 4% female genetically. Needless to say, I think this is well beyond eighth grade biology. Whether this condition is related to me being transgender, I can’t say. It’s not a discussion that I was willing to have with my doctor given how deep I was in the closet.