periwinkles (littorina saxatillis) are small sea snails. shell texture and color pattern are controlled by two linked genes. ridged shells (r) are dominant to smooth shells (r). banded shells (b) are dominant to solid shells (b). you cross snails with ridged, banded shells that are heterozygous at both loci to snails with smooth, solid snails and observe the following progeny: 96 ridged, banded 3064 ridged, solid 3131 smooth, banded 132 smooth, solid the phase of alleles in the ridged, banded heterozygous parent is: question 2 options: r r / b b r b / r b r r / b b b r / b r r b / r b r b / r b
