Semi-dominance
It occurs when the phenotype of the heterozygous genotype (a1/a2) is distinct from and often intermediate to the phenotypes of the homozygous genotypes (a1/a1 or a2/a2). The alleles a1 and a2 are semi-dominant.
Source:Wikipedia en
It occurs when the phenotype of the heterozygous genotype (a1/a2) is distinct from and often intermediate to the phenotypes of the homozygous genotypes (a1/a1 or a2/a2). The alleles a1 and a2 are semi-dominant.