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Practice problem

Pedigree — Definition & Charts

By Sylvia Freeman
This image shows a pedigree chart. In the first generation the father and the mother are both carriers. They have four children; three girls and one boy. In this next generation one daughter is affected, one daughter is unaffected, and the other two children are carriers. The second generation has children. One affected daughter had a carrier son with an unaffected man. The other carrier daughter has children with an unaffected man. Her son and daughter are unaffected and her other daughter is a carrier. The carrier son has children with an unaffected wife. Two of his children are unaffected and one is a carrier. The daughter who is unaffected has no children.

Based on this pedigree chart, what pattern of inheritance does the blue trait show?

Choose one answer

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

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