A gene form (allele) coding for a specific trait that is expressed even when a different allele is present; produces the same phenotype whether its allele is identical or dissimilar (homozygous dominant or heterozygous.)

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1. A gene form (allele) coding for a specific trait that is expressed even when a different allele is present; produces the same phenotype whether its allele is identical or dissimilar (homozygous dominant or heterozygous.)
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