homogamy

Etymology
From.

Noun

 * 1)  Fertilization of a flower by pollen from the same plant.
 * 2)  Breeding between similar individuals.
 * 3)  Marriage or other union between similar people, or people of the same sex.
 * 1)  Marriage or other union between similar people, or people of the same sex.
 * 1)  Marriage or other union between similar people, or people of the same sex.