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  • Posted: 01/28/2005
  • Reviewed: 09/01/2006

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Slide 17


Disease Inheritance Is Complex

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Most diseases do not follow simple patterns of inheritance.

Many factors influence a gene's ability to build proteins. For one thing, different mutations in the same gene can produce a wide range of effects. In cystic fibrosis, for example, the gene that controls mucus production can have more than 300 different mutations; some cause severe symptoms; some, mild symptoms; and some, no symptoms at all.

Disease Inheritance Is Complex