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Practice problem

Pedigree — Definition & Charts

By Sylvia Freeman
This image is showing a pedigree chart for Liddle's syndrome. In the first generation a male with Liddle's syndrome mates with a wild type woman who does not have Liddle's syndrome. They have two sons and three daughters. Two of the daughters and one of the sons in this second generation have Liddle's syndrome, and the other two children do not. In the third generation half of the kids of the affected parents have Liddle's syndrome, and half do not. None of the third generation children of unaffected second generation parents have Liddle's parents.

Image source: By Original: Dra marinavectorization: Razorbliss [CC0] CC BY 2.0, via Wikimedia Commons

This pedigree chart shows the inheritance of Liddle's syndrome in a family. Liddle's syndrome is a rare condition that affects normal kidney function, which causes high blood pressure and other symptoms. Based on the chart, what pattern of inheritance does Liddle's syndrome follow?

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

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