This occurs when two or more alleles control the inheritance of a character is called

Incomplete dominence leads to blending of phenotypes ie when there are two dominant alleles so like red+white cud give pink. But codominance means when there are two dominant alleles both are expressed like in AB blood group both the A allele and B allele are expressed.

Explanation:

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explanation:

genetic variation can be caused by mutation (which can create entirely new alleles in a population), random mating, random fertilization, and recombination between homologous chromosomes during meiosis (which reshuffles alleles within an organism's offspring).