genetic disorders

• cystic fibrosis

  an inherited disorder caused by a recessive allele. it affects the cell membranes across the body
• what is the chance of getting cystic fibrosis?

  if two carriers become parents there is a 1 in 4 chance of their child cystic fibrosis.
• what is the chance of a child becoming a cystic fibrosis carrier if both parents are carriers?


  1 in 2 chance of having a healthy child who carries the recessive allele
• what does cystic fibrosis being recessive mean?

  cystic fibrosis has to be present in both parents for it to have a possibility of passing on to their child
• what is polydactyly?

  an inherited disorder caused by a dominant allele. this condition is where extra fingers and toes are present
• what does polydactyly being dominant mean?

  it means it can be passed on to a child even if only one parent has the disorder