Irish Setters are type of dog. In Irish Setters, the allele for red coat color (R) is dominant over the allele for brown coat color (r). If a brown Irish Setter is crossed with a heterozygous red Irish Setter, which ofthe following genotypic ratios can
be expected?
Оа
2 RR: 1 Rr: Orr
Oь
1 RR: 2 Rr: 1 rr
Ос
2 RR: O Rr: 2 rr
Od
O RR: 2 Rr: 2 rr

2 Rr, 2 rr. (2:2 ratio)

Explanation:

The offspring will be Rr Rr and rr rr.

Since the red coated parent is heterozygous the recessive gene will have more of a chance to show when bred with the recessive brown Irish Setter.

Hope this is correct. Have a great day.

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