I think the answer is that both play a role but some of the effects are due to stereotypes above and beyond in-group favoritism.

我想两者都有,但刻板印象的影响,要高于组内偏爱。

耶鲁公开课 - 心理学导论课程节选

Where fat is distributed is relevant, but both men and women can have fat above the waist in what's called this abdominal obesity pattern.

脂肪的不同分布模式是有关系的,但男性和女性都会在腰以上囤积脂肪,这叫做腹部肥胖模式

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

So pi bonds have electron density both above and below the bond axis, but they actually have a nodal plane at this z, this bond axis here.

键在键轴之上,和之下都有电子密度，但它们在z方向有节面，这是键轴的地方。

麻省理工公开课 - 化学原理课程节选