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Pedigrees

Explore the intricate lineage of traits passed through generations in pedigrees. Learn the significance of carriers, modes of inheritance, and dominant vs. recessive phenotypes. Unravel the symbols and patterns in dominant and recessive pedigrees with practical examples. Discover the unique case of the Kentucky Blues Pedigree of Luna Fugate. Step into the world of genetic legacies and decoding family history.

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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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