Incomplete dominance in genetics results in an intermediate phenotype in heterozygotes due to partial dominance of alleles.
Incomplete dominance occurs when the dominant allele for a gene is not completely dominant to a recessive allele, resulting in an intermediate phenotype in heterozygotes who inherit both alleles. An example of incomplete dominance in humans is Tay Sachs disease, where heterozygotes produce half as much functional enzyme as normal homozygotes.
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