GRE Reading Comprehension: JiJing 352-GRE阅读机经352篇 - 6067B2YQ247VU6_OJ

The passage implies that in Lymnaea peregra, there will generally be A. more offspring of the nondominant hand in broods where handedness is determined after, rather than before, fertilization B. a sinistral gene that produces a protein in the cytoplasm of the egg cell C. fewer sinistral offspring in dextral broods than dextral offspring in sinistral broods D. equal numbers of exclusively left-and right-handed broods E. an increasing occurrence of left-handedness in successive broods