How is the attraction between 2 people influenced by biology?​

The biological part of our attraction lies in something called the major histocompatibility complex (MHC) or human leukocyte antigen (HLA) and the going theory is that opposites attract. Put another way, the more different our HLA types are from one another, the more likely we are to find each other attractive.

Explanation:

I hope this helps! ^^

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answer; i believe that the correct answer is ; males are hemizygous for the x chromosome;