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Pedigrees

Pedigrees. Passing Through the Generations: How to Read a Pedigree. Pedigrees. Family history that shows how a trait is inherited over several generations. Carriers: those heterozygous for a trait. Can determine if autosomal (occurs equally both sexes) sex-linked (usually seen in males)

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Pedigrees

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  1. Pedigrees Passing Through the Generations: How to Read a Pedigree

  2. Pedigrees • Family history that shows how a trait is inherited over several generations. • Carriers: those heterozygous for a trait. • Can determine if • autosomal (occurs equally both sexes) • sex-linked (usually seen in males) • heterozygous (dominant phenotype) • homozygous (dominantdominant phenotype, recessive recessive phenotype)

  3. Pedigree Symbols

  4. Dominant Pedigree • affected individuals have at least one affected parent • the phenotype generally appears every generation • two unaffected parents only have unaffected offspring

  5. Recessive Pedigree • unaffected parents can have affected offspring • affected progeny are both male and female

  6. Sex-linked Recessive

  7. Kentucky Blues Pedigree of Luna Fugate taken from the genealogically correct Fugate pedigree

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