genetic diseases

• polydactyly

  • extra fingers or toes
  • caused by dominant allele
  • genotype for - PP or Pp
  • genotype against - pp
  • has no carriers
• cystic fibrosis

  • disorder of cell membranes. causes sticky mucus on lungs
  • caused by recessive allele
  • genotype for - cc
  • genotype against - CC or Cc
  • carriers - genotype Cc