Practice question

In Mendelian inheritance with complete dominance, heterozygote carries one dominant and one recessive allele but produces sufficient dominant gene product to achieve dominant phenotype threshold, such as enzyme activity or structural protein. Consequently phenotypic expression of heterozygote shows dominant trait, identical to homozygous dominant, e.g., tall Tt same as TT. Recessive trait appears only in tt lacking dominant allele. Blended or intermediate trait characterises incomplete dominance, not Mendelian complete dominance where heterozygote fully expresses dominant phenotype. Cytological correlation with prophase pairing, metaphase alignment and anaphase separation provides visual anchor for memorising genetic laws.