Related by context. Frequent words. (Click for all words.) 59 interbreeding 55 genetic diversity 52 offspring 50 inbred 50 genetic defects 49 intermarriage 49 predation 49 selective breeding 47 breeding 45 overpopulation 45 interbreed 45 crossbreeding 45 breeders 45 genetically 45 overgrazing 45 bloodline 44 mutation 44 bloodlines 44 extinction 44 genetically identical 43 herd 43 hybridization 43 genetic abnormalities 43 lineages 43 mtDNA 42 genetic 42 translocation 42 heritable 42 extinctions 42 parthenogenesis 42 genetic defect 42 heredity 42 fecundity 41 lineage 41 malformations 41 genetics 41 bred 41 genetic mutations 41 crossbred 41 genetic variation 40 mutations 40 crossbreed 40 chromosomal abnormalities 40 alleles 40 genetic mutation 40 breeds 40 recombination 40 herds 40 purebred 40 stillbirth 40 infanticide 40 breed 40 euthanization 40 subspecies 39 gender imbalance 39 Y chromosome 39 phenotype 39 mating 39 Genetically 39 hereditary 39 foals 39 progeny 39 extinct 39 speciation 39 domestication 39 iodine deficiency 39 chromosomal 39 cross pollination 39 genetic predisposition 38 artificially inseminated 38 gene mutation 38 malnourishment 38 stillbirths 38 genetically distinct 38 breeding herd 38 Y chromosomes 38 chromosomes 38 genetic manipulation 38 fertility 38 genetic traits 38 euthanized 38 pups 38 wolf packs 38 taxa 38 genetic makeup 38 birthrates 37 cubs 37 reproduction 37 premature birth 37 mated 37 depopulation 37 artificial insemination 37 warmer winters 37 tuatara 37 species 37 storks 37 breeding pairs 37 genes 37 mitochondrial DNA 37 depredation 37 genetically programmed