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The Smith family is afflicted with a genetic disorder known as Pinocchio nose syndrome, which causes affected adults to grow noses in excess of five inches long. 100 members of the Smith family show up for a family reunion. Of the fifty-three women, thirty-seven have unusually large noses. Of the forty-seven men, thirty-six have an enormous nose. Based on these figures, Pinocchio nose syndrome is probably:

A) Dominant and sex-linked
B) Recessive and sex-linked
C) Dominant, but not sex-linked
D) Recessive, but not sex-linked

Answer :

Answer:

dominant, but not sex linked

Explanation:

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Rewritten by : Barada

Based on the information provided, Pinocchio nose syndrome appears to be dominant, but not sex-linked. Option C is the correct choice.

This conclusion is drawn from the fact that both men and women in the Smith family are affected by the syndrome, indicating that it is not limited to a specific sex. Additionally, the presence of the trait in each generation suggests that it is dominant, as it manifests in individuals who inherit even one copy of the dominant allele.

The high frequency of affected individuals in the family reunion further supports the dominance of the trait. If the disorder were recessive, it would be less likely to affect such a large proportion of the family members unless both parents were carriers or affected. However, the fact that a significant number of individuals have the trait suggests that it is dominant and not recessive. Therefore, option C) dominant, but not sex-linked, is the most likely scenario based on the given data.