In Pansies, two genes, B and D, control the synthesis of the pigments in flower petals. The biochemical pathway is shown. In each case the uppercase letter codes for the wildtype enzyme and is dominant. a What color flowers, would you expect in a plant of genotype bbDD? b. What color flowers, would you expect in a plant of genotype BBdd? c. If the plants in parts a and b are crossed what color petals would the Fl plants have? gene B gene D enzyme enzyme white white intermediate purple pigment precursor

In cats, the gene for calico (multicolored) cats is both sex-linked and codominant. Due to a phenomenon known as dosage compensation, females that receive a B and an R gene have black and orange splotches on white Males can only be black or orange, but never calico. a. What would a calico cat’s genotype be? b. Show the cross of a female calico cat with a black male. What percentage of the kittens will be black and male? c. What percentage of the kittens will be calico and male?                                d. What percentage of the kittens will be calico and female? e. Show the cross of a female black cat with a male orange cat. f. What percentage of the kittens will be calico and female? What color will all the male cats be?

Outline the basic hybridization research done by Mendel when crossing a true breading violet flowered plant with a true breeding white flowered plant? In your answer you should indicate the parental generation, the F1, and the F2 results.

In some plants a red pigment is synthesized from a colorless precursor. The addition of a hydroxyl group to the precursor molecule causes it to become purple. In a cross between two randomly selected purple plants, the following results were obtained. 94 purple 31 red 43 white Q:What are the genotypes of the two random purple plants?       R/r; P/p X R/r; P/p       R/r; p/p X R/r; p/p       r/r; P/p X r/r; P/p       r/r; p/p X r/r; p/p       R/R; P/P X r/r; p/p