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A severe illness which affects the red blood cell count has been found to be hereditary. Fifty percent of those who are diagnosed with the illness have a parent who suffers from it. A known scientist has hypothesized that 50% of the children of carriers of the illness will also suffer from it at one point or another.
Which of the following, if true, would most weaken the conclusion drawn by the known scientist?
A. There are many diseases which are genetic, but few of them show a 100% chance of transferring to one's children.
B. Those suffering from the disease whose parents also suffer from it have, on average, one other sick sibling and three healthy siblings.
C. The illness, though serious, it treatable.
D. The average number of children per woman across the globe is less than 2.
E. If you have the illness, the chance that any specific grandchild of yours will suffer from it is 25 out of 100, considering no-one else in the grandchild's family has the disease.
OA B
Source: Economist Gmat
Which of the following, if true, would most weaken the conclusion drawn by the known scientist?
A. There are many diseases which are genetic, but few of them show a 100% chance of transferring to one's children.
B. Those suffering from the disease whose parents also suffer from it have, on average, one other sick sibling and three healthy siblings.
C. The illness, though serious, it treatable.
D. The average number of children per woman across the globe is less than 2.
E. If you have the illness, the chance that any specific grandchild of yours will suffer from it is 25 out of 100, considering no-one else in the grandchild's family has the disease.
OA B
Source: Economist Gmat
