OVERDOMINANCE
excessive dominance.
a condition in which a heterozygote (having a copy of two different alleles of a gene) has a phenotype which falls beyond the extremes of the range represented by the corresponding homozygotes (having two copies of one or other of the alleles).
a condition in which a heterozygote (having a copy of two different alleles of a gene) has a phenotype which falls beyond the extremes of the range represented by the corresponding homozygotes (having two copies of one or other of the alleles).