Practice problem
Dihybrid Crosses — Definition & Examples
A kind of apple has a gene that codes for color and another gene that codes for an insect-resistant protein. The dominant phenotype for color (genotype Rr or RR) gives a red color. The dominant phenotype for bug resistance (genotype Pp or PP) means the plant does have the protein.
The traits of color and bug resistance are inherited independently for this species of apple.
Which combination of apple tree parents would NOT produce any bug-resistant offspring?