inherited disorders

• downs syndrome

  • babies are born with an extra chromosome which affects appearance and brain
• polydactyly

  • babies re born with an extra finger or toe
  • it is caused by a dominant allele. it can e inherited
• huntingtons disease

  • develops in middle age
  • it defects the nervous system and the brain which eventually leads to death
• cystic fibrosis

  • a faulty gene causes the transport of ions across cell membranes to not work properly
  • symptoms include infertile, poor weight gain, very bad cough and bad infection