It has no genders.

它没有性别之分。

Women might be the more aggressive of the genders.

女人可能更加富于攻击性。

A mix of the genders in both science and maths is optimal.

数学与科学学科中，性别混合是最优化的选择。

We only assume that they should be into both genders at all.

我们只是假设他们应该会和两种性别都交往。

This was true throughout the groups and within the genders.

分别通过整体测试和性别的测试，这一说法都是正确的。