intermix

To mix together; to intermingle or blend.

Either that, or “you have two different groups of hominins with two totally different toolmaking traditions occupying the same landscape at the same time yet never intermixing,” said the study’s lead author, Daniel Adler, an anthropologist at the University of Connecticut.

An intermixture; the product of mixing together

This idealized structure may not exist in reality, considering the high divorce rate and the intermixes of maternal-paternal dominance characteristics.