👉 In biology, haploism refers to a genetic phenomenon where two genes can have an identical set of alleles (the same sequence of amino acids or DNA sequences) but with different functional effects due to different combinations of their alleles. This is known as haplotype. For example, the gene for height (H) and the gene for muscle mass (M) could both be expressed in a heterozygous state (one copy of H and one copy of M), however, they would have