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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 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) • heterozygous (dominant phenotype) • homozygous (dominantdominant phenotype, recessive recessive phenotype)
Dominant Pedigree • affected individuals have at least one affected parent • the phenotype generally appears every generation • two unaffected parents only have unaffected offspring
Recessive Pedigree • unaffected parents can have affected offspring • affected progeny are both male and female
Kentucky Blues Pedigree of Luna Fugate taken from the genealogically correct Fugate pedigree