Lamarck's idea of the "inheritance of acquired traits" proposed that a. in animals, traits that are used often will grow and change shape. b. acquired traits are passed down from parent to offspring. c. in animals, traits that are not used often will shrink and change shape. d. acquired traits are not passed down from parent to offspring.

3. in the fruit fly, recessive mutation brown, b, causes brown color of the eye and absence of red pigment. recessive mutation p of another independent gene causes purple color of the eye and absence of brown pigment. the cross of a brown-eyed female and purple-eyed male produced wild type eyes. what will be the colors and their ratio in f2?