Bill and Bob are 22-year-old identical twins.Bill suffers from alcoholism.Using the data cited in your textbook,what are the chances that Bob also struggles with this problem?

Question

Quizplus · Accepted Answer

According to the textbook, the heritability of alcoholism is estimated to be about 50-60%, which means that genetics account for about 50-60% of the variance in whether or not someone develops alcoholism. Since Bill and Bob are identical twins, they share 100% of their genes. Therefore, the likelihood of Bob also struggling with alcoholism is 50-60%. This corresponds to approximately 39% chance that Bob also suffers from alcoholism. Therefore, choice C is the correct answer.

Bill and Bob Are 22-Year-Old Identical Twins