Practice question

Question

Given below are a few statements regarding gene actions observed in plants. A. In terms of pollination, self-pollinated species often exhibit additive gene action. B. Non-additive gene action is less prevalent in cross-pollinated species. C. Simply inherited (qualitative, oligogenic) traits predominantly exhibit nonadditive and epistatic gene action. D. Genetic fixation of superior genes will be more difficult with dominance gene action. Which one of the following options represents the combination of all correct statements?