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A form of clonal reproduction in species hybrids whose gametes carry only the nuclear genome derived from one of the parental species. For example, a hybrid species of frog, Rana esculenta, is derived from crosses between R. lessonae and R. ridibunda, but only ridibunda chromosomes (and lessonae mitochondria) are found in gametes of esculenta.

Subjects: Genetics and Genomics.

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