Biologists and Staticians... what's going on here? There hasn't been a female born in my husband's family in two generations. Help solve the brothers' debate about what's causing this, and what the odds of our pregnancy being male or female is. [more inside]
I am interested in what hormonal differences exist between men and women and what effect this has on behavior. I don't have the biology background to be able to handle a textbook. This is a contentious area, so I'm only interested in claims or resources that are well referenced - not unsupported pop-sci or ideological claims. My level of detail would be an extended blog post or article, rather than a book
How strong is the correlation between non gender conformity and homosexuality? [more inside]
Can you recommend a book chapter or article that summarizes the biological and/or psychological perspectives on gender without devolving into straw-man attacks or interdepartmental backbiting? [more inside]
How many sexes are there? [more inside]
Are there really such things as "scars on chromosomes" and "X vs. Y" 'wars' between the male- and female-determining genes? [more inside]
Is there a proven biological explanation why women live longer than men?
How did we evolve separate genders? I assume it happened pretty early on, since most animals have a male and female, but wouldn't it have had to happen to lots of things at once for it to actually work?