Reproduction by parents of different races (especially by white and non-white persons). Synonyms:interbreeding, miscegenation.
Crossbreed
verb
(past crossbred; past part. crossbred)
1.
Breed animals or plants using parents of different races and varieties. Synonyms:cross, hybridise, hybridize, interbreed."Mendel tried crossbreeding" , "These species do not interbreed"