Autosomal Inheritance

• A pedigree is a diagram used to represent the inheritance of traits through a family over a number of generations
• Pedigrees allow us to work out whether a trait is caused by dominant or recessive alleles, or if its autosomal or sex linked
• Key:

  
• Autosomal

  Trait associated with gene on an autosome
• Autosomal Dominant

  
• Autosomal Dominant

  
• Once a trait is lost in inheritance, it is lost forever
• Autosomal dominant traits

  
• Recessive needs two copies of the recessive allele to exhibit the trait
• Autosomal recessive

  
• Autosomal Recessive