GRE Reading Comprehension: JiJing 352-GRE阅读机经352篇 - HAM4K3LN20D605CQJ

The author of the passage mentions the "hereditary hemochromatosis mutation" primarily in order to illustrate A. the circumstances under which a founder mutation fails to cause a disease. B. how difficult it is to predict the effects of founder mutations on carriers. C. the difference between harmful founder mutation and those that are beneficial. D. how a single copy of a founder mutation can benefit a carrier. E. a challenge to a particular theory about the transmission of founder mutations.