Originally Posted by
Confucius
I've enjoyed reading this thread and thought I'd add my own perspective to the mix.
Gender identity depends upon three factors; (1) the physical morphology (penis or vagina), (2) the chromosomes/genes (X,Y=male, X,X=female), and the brain (males and females have distinct neural networks). In most cases these three factors are in agreement, however, they don't have to be in agreement. For instance, you can have a genetic male (X,Y chromosomes) who will have a defect in the SRY gene of the Y-chromosome. This condition will make the person appear as a normal female (with vagina, breasts, etc), however he/she will be sterile. They usually don't know they are genetic males until they question why they don't have a menstrual period and see a physician who determines that they are genetic males.