Men's higher rates of aggressive and risky behavior may not be solely attributable to the Y chromosome.

“I mean I'm actually very fascinated by that Steve because I don't understand where that is in their genes um like you would think well that has to be sexlink right but right you know when you look at men who are double y's so you know there are some men who don't get an X chromosome they get two y's they turn out to be no more aggressive than a standard XY so it's not something as just as simple as like well that Y chromosome has it's it's going to be a little bit more nuanced than that”