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Practice problem

Pedigree — Definition & Charts

By Gabi Slizewska
An affected female has children with an unaffected male. Their children are two affected males and two unaffected females. One of the affected males has two children with an unaffected female. The children don't have the trait. The unaffected daughter of the original couple has two children with an unaffected male. Both children are unaffected. The other affected son of the original couple has children with an unaffected female. The children are an affected female and a male whose phenotype we do not know. The affected daughter has kids with an unaffected male. Those kids are two unaffected females and an affected male.

The pedigree above shows how an X-linked recessive trait is passed on through several generations. What is the genotype of the individual labeled with a question mark?

Choose one answer

Type a concept, like “slope” or “photosynthesis”.

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