試題詳解

43. You cross a true‐breeding, red‐flowered snapdragon with a true‐breeding, white‐ flowered one. All of the F1 are pink. What does this say about the parental traits?
(A)red and white are codominant
(B)red shows incomplete dominance over white
(C)pink is dominant, and red and white are recessive
(D)red is completely dominant
(E)both red and white are pleiotropic