When walnut combed chicken were crossed with single combed chicken, only walnut combed chicken were obtained in F1. The genotypes of the parents was
A. RrPp × rrpp
B. RRPP × rrpp
C. RRpp × rrpp
D. RRPp × rrpp
Answer:B
When walnut combed chicken were crossed with single combed chicken, only walnut combed chicken were obtained in F1. The genotypes of the parents was
A. RrPp × rrpp B. RRPP × rrpp C. RRpp × rrpp D. RRPp × rrpp