Question

Which of the following is a dihybrid cross ?

• A. YYRR $\times$ yyrr
• B. YyRr $\times$ Yyrr
• C. Yyrr $\times$ yyrr
• D. Tt $\times$ Tt

Answer 1

The correct option is A YYRR $\times$ yyrr

• A dihybrid cross is a cross between individuals of the same species in which the inheritance of contrasting pairs of two traits are compared.
• For instance, in a plant species, the YY denotes yellow seed character dominant trait, yy denotes green seed character recessive trait, RR denotes round seed character dominant trait and rr denotes wrinkled seed character recessive trait. Thus, YYRR $\times$ yyrr represents a dihybrid cross.

Hence, the correct answer is option A, i.e., YYRR $\times$ yyrr.