It is the simultaneous inheritance of two characters.
• Dihybrid inheritance is the experimentation of two characteristics with their four contrasting traits.
• For instance, dihybrid inheritance involves a plant producing round and yellow seeds (RR and YY) crossing with a plant producing wrinkled green seeds (rr and yy).
• F1 progeny produces round and yellow seeds (R and r, and Y and y) in which round and yellow are dominant traits.
• F2 progeny were similar to their parents and produced round yellow seeds, while some of them produced wrinkled green seeds. However, some plants of the F2 progeny even showed new combinations, like round-green seeds and wrinkled-yellow seeds.
Thus the tall/ short trait and the round seed/wrinkled seed trait are independently inherited.
