Alleles (or alleles). Definition

Medical Definition: Alleles (or alleles)

In the transmission of hereditary characteristics, according to Mendel's theory, are named each of the two genes in the pair that occupies the same position on homologous chromosomes present in the same place (locus) of the pair of homologous chromosomes, which appears alternatively in the offspring, which have either of these characters, but never both at once. In general, this is one of several alternative states of the same gene. His expression determines the same character or trait of organization, such as eye color.

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