In cocker spaniels the allele for a black coat color (B) is dominant over the allele for a brown coat color (b). If a brown cocker spaniel is crossed with a het erozygous black cocker spaniel which of the following genotypic ratios can be expected? 1BB:2Bb:1bb 2BB:0Bb:2bb 0BB:2Bb:2bb 2BB:1Bb:0bb

To determine the genotypic ratio of the offspring from crossing a brown cocker spaniel with a heterozygous black cocker spaniel, we need to consider the alleles involved.Given information:- for a black coat color (B) is dominant over the allele for a brown coat color (b).- A brown cocker spaniel has the genotype bb.- A heterozygous black cocker spaniel has the genotype Bb.When crossing a brown cocker spaniel (bb) with a heterozygous black cocker spaniel (Bb), the possible genotypes of the offspring can be determined using a Punnett square.Punnett square:``` B b +------+------+b | Bb | bb | +------+------+b | Bb | bb | +------+------+```From the Punnett square, we can see that the possible genotypes of the offspring are:- 2 Bb (heterozygous black)- 2 bb (brown)Therefore, the correct genotypic ratio that can be expected is: So, the correct answer is: