biology unit 5 genetics pedigree notes
TRANSCRIPT
Biology
Unit 5 Notes:Pedigrees
(1) What Is A Pedigree?
• A chart used to organize and visually display the traits inherited by family members.
• Purpose:– Analyze how traits are passed through the
family.–Make genetic predictions for future offspring.
(2) Parts of a Pedigree
• Square = Male• Circle = Female
• Filled In = Has the trait• Empty = Does not have the trait
• Horizontal Lines connecting square + circle shows marriage / courtship.
• Vertical Lines show offspring/descendents.
• Bottom = Youngest generation• Top = Oldest generation
(3) Interpreting a Pedigree
Attached Ear Lobes = DominantDetached Ear Lobes = Recessive