Dominant means that one gene in the gene pair is able to control the trait which that gene pair codes for, recessive means that both genes in the gene pair are necessary to control the trait.

The hereditary mode of handedness or folding leg was likely the dominant heredity of single gene of autosome, and the right type of them was the dominant character.

The results showed that: (1) for Hair forms and Nasal profile, the frequency of the dominant gene was lower than that of theirs recessive gene, but the opposite was true for Nostril forms.