hybridization, introgression, hybridisation, interbreeding, breeding, backcrossing, heterosis, tetraploid, asexual reproduction, parthenogenesis, artificial insemination, outcrossing, teosinte, rootstocks, coevolution, apis mellifera, germ plasm, transgenic, ladybird beetle, spodoptera, sus scrofa, aurochs, gallus gallus, gregor mendel, sorghums, breeders, africanized bee, inbreeding, rheas, oryza sativa, geneticists, vitis vinifera, zebu, nematode, domestication, bollworms, triticum, foxtail millet, landrace, chimaera, mutagenesis, polyploidy, subsp, endophyte, trichinella, silkworm, chestnut blight, mating, zea mays, barbatus, cultivars, johnsongrass, lablab, potato blight, reticulata, cloning, cucumis, solanum tuberosum, agouti, babirusa, sorghum bicolor, perilla, brassica napus, guanacos, solanum, herds, bos taurus, horseweed, hessian fly, fleabane, leafminer, bos indicus, fall armyworm, multiflora rose, drosophila, pummelo, offspring, mouflon, estrous, cacao tree, wireworms, ambystoma, armillaria, bromegrass, banteng, oviducts, varieties, vernalization, periodical cicada, hawkweed, codling moth, lagomorphs, ruddy duck, xanthomonas, mycoplasma, abscission, pluot, monotreme, japonicus, phylogenies, parasitoid, seladang, cropping, dredging, experimentation, intermingling, manuring, rearing, spraying, afforestation, cultivation, erasure, fertilisation, grazing, irrigation, looting, poaching, weeding

bos indicus, brahma, brahman, brahmin, crossbreed, crossed, grade, hybrid, interbred, intercrossed, rock cornish

conjugation, coupling, pairing, procreation, reproduction, sexual union, union

cross, crossing, hybridizing, miscegenation