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

7. Sex-linked Recessive

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