Q.Which Mendelian idea is depicted by a cross in which the F1 generation resembles both the parents ?

Codominance is an intragenic (allelic) interaction in which both alleles of a heterozygous gene pair are expressed together, fully and distinctly, in the same individual, rather than one allele masking the other (as in complete dominance) or the two blending into a single new intermediate (as in incomplete dominance). The clearest human example is the ABO blood group system, where the IA and IB alleles of the I gene are codominant with each other - an individual with genotype IAIB expresses both the A and B antigens on their red blood cells simultaneously, while both IA and IB are separately dominant over the recessive i allele. Codominance has also been demonstrated directly in plants: hybridising two cotton species with different seed-protein electrophoresis banding patterns produces an F1 hybrid whos …