Q.When the F2 phenotypic and genotypic ratios are the same, then it is an example of ............

Co-dominance occurs when both alleles of a pair are expressed fully and independently in the heterozygote — not blended as in incomplete dominance, but both visibly present at once. The classic example is coat colour in cattle: crossing red-coated ($RR$) with white-coated ($WW$) cattle produces roan ($RW$) offspring whose coats carry a genuine mixture of red and white hairs side by side, rather than a uniform intermediate pink-brown shade. …