Actually penis phenotypical. As long as you have a Y chromosome you are a male. Here is the argument to make their head explode. They say that being gay is genetic. Not a choice. If we have to accept this definition, then likewise gender and sex are genetic (clearly there are sec chromosomes. Still looking for the gay gene but let’s just accept the argument theoretically), then how can we accept that gender is a choice. Either LGBQAlphabet is genetic which means that gender is too. OR it’s a choice which means gender is as well but if a choice then one cannot be discriminated against due to sexual lifestyle as it is a choice.
QED
“They say that being gay is genetic. Not a choice.”
They tried to find a gay gene before but came up negative which is what they are.