Hey, Anon, can you educate me on genetics and transgenders?

Recently I had an arguement with some transgender people and I could not oppose anything to researches in this area, cause I haven't got one. It would be nice if I were provided with links to some research, in particular:

Does HRT affect the brain state and body constitution?

The human personality depends more on genetics than on education?

It would be good if there are already some archived threads with the same respondings.