Remember that,in Labrador retrievers,B (black coat)is dominant to b (brown coat)and homozygosity for the recessive epistatic allele e always results in a yellow coat.A brown female is crossed to a yellow male,and their progeny consists of six black puppies.Interestingly,when one of the F₁ females is crossed to her yellow father,she gives birth to seven puppies: three yellow,three black,and one brown. What are the most likely genotypes of the original brown female and yellow male?