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Take out pedigree homework

Explore pedigrees and inheritance patterns to track genetic disorders in your family. Learn about autosomal and sex-linked inheritance, symbols, and how traits are passed down. Discuss with your group and be prepared to share your findings!

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Take out pedigree homework

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  1. Take out pedigree homework Discuss with your group the trait you chose, and what you found out about your family! Be ready to share!!!!

  2. Pedigrees

  3. What is a pedigree • Family tree used to track genetic disorders/abnormalities • Can be used to determine the mode of inheritance for a particular disorder

  4. Pedigree symbols

  5. Determining inheritance patterns • Autosomal inheritance • Sex-linked inheritance

  6. Autosomal inheritance controlled by a gene on an autosome (chromosomes 1-22) • Autosomal dominant • Males and females are affected equally • Many individuals are affected • Affected child MUST have an affected parent • No carriers • Autosomal recessive • Males and females affected equally • Two affected parents will always have an affected child • Normal parents can have an affected child • Has carriers

  7. Sex-linked inheritance • X-linked recessive • Affects more males than females • Many females are carriers • Males CANNOT be carriers • X-linked dominant • No carriers (male or female) • All daughters of an affected male and a normal female are affected • All sons of an affected male and a normal female are affected • Y-linked • Affects only males • Either have it or you don’t

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