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Olympiad-style Reasoning — quick quiz

5 real NSEB questions on Olympiad-style Reasoning. Instant scoring and solutions, no signup — see where you stand in ~3 minutes.

Question 1 of 5

MEDIUM

A genetic counselor analyzes a pedigree where a rare autosomal recessive disorder appears in the offspring of consanguineous marriages in multiple generations. If two phenotypically normal first cousins (both carriers) decide to have children, what is the probability that their first child will be affected by the disorder?