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allele is a variant form of a gene.
Some genes have a variety of different
forms, which are located at the same position, or genetic locus, on a chromosome.
Humans have two alleles at each
genetic locus, with one allele inherited from each parent. Each pair of alleles
represents the genotype of a specific gene.. When the alleles of a pair are heterozygous, one may be dominant and the other recessive. The dominant allele is expressed and the recessive allele is masked.
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Jun 21st, 2015
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