Question

In cocker spaniels, the allele for black coat color (B) is dominant over the allele for brown coat color (b) if a brown cocker spaniel is crossed with a heterozygous black cocker spaniel whih of the following genotypic ratios can be expected
A: 1Bb: 1bb
B: 1BB: 2Bb: 1bb
C: 1BB : 1Bb
D: 3BB : 1bb

Answer 1

The answer is; A

The punnet square below illustrates the F1 offspring of a cross between a heterozygous black cocker spaniel with a brown cocker spaniel. The genotypic ratio, and also phenotypic ratio, would be 1:1