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.
利手和叠腿很可能均为常染色体单基因遗传，利手右型和叠腿右型分别为显性性状；
2
The hereditary mode of rolling tongue or pointed tongue was the dominant heredity of single gene of autosome, and the can-rolling type or can-pointed type was the dominant character.