Noun | 1. | ![]() mating, pairing, sexual union, union, coupling, conjugation - the act of pairing a male and female for reproductive purposes; "the casual couplings of adolescents"; "the mating of some species occurs only in the spring" dihybrid cross - hybridization using two traits with two alleles each monohybrid cross - hybridization using a single trait with two alleles (as in Mendel's experiments with garden peas) reciprocal cross, reciprocal - hybridization involving a pair of crosses that reverse the sexes associated with each genotype testcross, test-cross - a cross between an organism whose genotype for a certain trait is unknown and an organism that is homozygous recessive for that trait so the unknown genotype can be determined from that of the offspring genetic science, genetics - the branch of biology that studies heredity and variation in organisms |
2. | crossbreeding - reproduction by parents of different races (especially by white and non-white persons) facts of life, procreation, reproduction, breeding - the sexual activity of conceiving and bearing offspring |