Biology

Option A (Incomplete Dominance) and Option B (Co-dominance) both follow the general principle of two factors (alleles) determining the genotype.
In incomplete dominance, one allele is not completely dominant over the other, and in co-dominance, both alleles contribute equally to the phenotype.
However, the two alleles still determine the genotype.

Option C (Polygenic Inheritance) demonstrates an exception to the rule because skin color, as an example, is influenced by multiple genes, each contributing to t...