試題詳解

38. A plant that is self-incompatible has a genotype of S₅S₉ for the S-locus. It receives pollen from a plant that is S₃S₉. Which of the following is most likely to occur?
(A) About half of the pollen will germinate.
(B) Fertilization will occur in about half of the flowers of the pollinated plant.
(C) None of the pollen will germinate.
(D) Pollen from the S₃S₉ plant will secrete ribonuclease that destroys epidermal cells of the $559 stigma.

(E) All of the pollen will germinate, forming pollen tubes.