What is co-dominance? Explain with reference to the ABO blood group system.
Co-dominance is a genetic phenomenon where both alleles of a gene are fully expressed in the organism’s phenotype. Unlike in dominance-recessive inheritance, where one allele masks the expression of another, in co-dominance, both alleles contribute equally and are visible in the organism’s traits. This means that neither allele is dominant or recessive, and the heterozygote … Read more