New species can arise from existing species {speciation}|.
hybridization
Hybrids between two different species sum chromosome-pair numbers. If eggs are fertile, self-fertilization starts new species intermediate between parent species. Chromosome doubling created many plant species and some animal species.
chromosome change
New species can arise through chromosome-number or gene-order change. Human chromosomes differ from chimpanzee chromosomes by inversions in nine chromosomes and by fusion of two chromosomes.
Biological Sciences>Biology>Evolution>Species
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Date Modified: 2022.0224