Pedigrees

• If the predigree is tracking a dominant gene, the genotype will be AA or Aa
• If the pedigree is tracking a recessive gene, the genotype will be aa
• Autosomal dominant traits cannot skip generations
• In autosomal dominant pedigrees, two affected parents can have an unaffected child
• In autosomal recessive pedigrees, an affected child may have unaffected parents
• Autosomal recessive traits can skip generations.
• In autosomal recessive traits, two affected parents must produce affected offspring.
• In autosomal recessive traits, an affected child may have unaffected parents.
• squares represent males, circles represent females