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superman100g

A gene is a stretch of DNA or RNA that determines a certain trait. Genes mutate and can take two or more alternative forms; an allele is one of these forms of a gene. An allele refers to a specific variation of a gene.

becky787

gene is a unit of heredity that is transferred from a parent to offspring and is held to determine some characteristic of the offspring and allele is one of two or more alternative forms of a gene that arise by mutation and are found at the same place on a chromosome.

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