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allele




One of two or more variant forms of a gene at a particular locus, or location, on a chromosome. Different alleles (Gr. allelon = "of one another") produce variation in inherited characteristics such as hair color or blood type. In an individual, one form of the allele (the dominant one) may be expressed more than another form (the recessive one).

alleles


Related category

   • GENETICS AND HEREDITY

Source: National Human Genome Research Institute