Y-linked pedigree: a random family over 3 generations

An example figure from the Pedigree generator.

A three-generation pedigree of 18 people in which only I-1, his son II-2 and II-2’s sons III-1 and III-2 are affected, all men, with a key — A random three-generation family of 18 people. The affected man in generation I, I-1, has an affected son, II-2, whose two sons, III-1 and III-2, are affected too; every woman is unaffected, and so are the sons of I-1’s daughters. There is no chart title, so the figure doesn’t give the trait away.

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Answer key

Y-linked inheritance

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