Problem:
Due to the role of Drosophila as a biological model, many eye color mutants have been isolated and used to analyze genetic control of eye pigmentation. Wild-type eye color is brick red due to a mixture of red and brown pigments. Vermillion (Xv) is a recessive, X-linked mutation causing bright red eye color due to lack of brown pigments. Brown (b) is a recessive, autosomal mutation causing brown eye color due to lack of red pigments. White eyes result from the loss of both red and brown pigments. Crosses between vermillion and brown flies show that the two mutations complement each other.
Required:
Question 1: What genotype(s) and eye color phenotype(s) do you expect to see in the progeny of a cross between a brown female and a vermillion male (both from true-breeding lines)? If male and female progeny would look different, clearly indicate this.
Question 2: In a completely separate cross, half the progeny are brown-eyed and half the progeny are white-eyed. What are the genotypes and phenotypes of the parents?
Does anybody know any source of this kind?