8.2-pedigree charts

• Autosomal dominant trait

  • male and female infected in al numbers
  • all infected have 1 parent who have it.
  • once it disappears, it NEVER COMES BACK
  • fathers and mothers pass on
• autosomal recessive

  • both genders are effected
  • 2 unaffected have an affected
  • all children of parents who have will have it
  • it can skip a generation
• x-linked dominant

  • male pass to daughter
  • every infect person has an infected parent
  • once it i gone it NEVER COMES BACK
  • more girls
• x linked recessive

  • affected girls make affected sons
  • daughters of affected males are carriers
  • all children of 2 parents affected will show
  • more males affected
• y linked

  • males
  • males pass to son
  • can NOT skip a generation