Coat

colour in Labrador retriever dogs is controlled by epistasis, the ee genotype

(yellow coat) being epistatic to the B gene (which controls black or brown

colour, brown being recessive). In a cross between dogs with the Eebb (brown)

and EeBb (black) genotypes, what proportion of the offspring would result in

Labradors with yellow coats? 

Give your answer as a percentage, do not include the % sign.