Why is it that sometimes two different species of animals reproduce and produce a sterile offspring?
Sometimes related species undergo mating in nature but definitely resultant will be sterile. Although scientists have produced fertile plant hybrids too, e.g. First Man made cereal, secale .Hybrids can be classified as: 1. Interspecific. Hybrids between different species within the same genus are sometimes known as interspecific hybrids or crosses. 2. Intraspecific hybridsHybrids between different sub-species within a species are known as intra-specific hybrids. 3. Intergeneric hybrids. Hybrids between different genera are sometimes known as intergeneric hybrids. 4. Interfamilial hybrids.Extremely rare interfamilial hybrids have been known to occur e.g. the guineafowl hybrids. The second type of hybrid consists of crosses between populations, breeds or cultivars within a single species. This has been done by agricuturists in plant and animal breeding. In plant and animal breeding, hybrids are commonly produced and selected because they have desirable characteristics not found or incons
