A dihybrid cross studies the inheritance of two different traits at the same time.
Ex.: Two variations: flower color (red vs. white) and seed shape (round vs. wrinkled), a dihybrid cross would involve crossing a plant with red flowers and wrinkled seeds (RRyy) with a plant with white flowers and round seeds (rrYY). The offspring or F1 generation will show both dominant traits, i.e. red flowers with round seeds (RRYY)
Differs from Monohybrid Cross that examines the inheritance of a single trait only.