inherited disorders

Question 1

describe cystic fibrosis

Answer 1

• disorder of cell membrane
• results in body producing a lot of mucus in the air passages and pancreas
• caused by a recessive allele
• to have, both parents must be carriers, or have the disorder themselves

Question 2

describe polydactyly

Answer 2

• having extra fingers or toes
• caused by dominant allele
• can be inherited if just one parent carries the defective allele

Question 3

embryo screening for

Answer 3

• help stop people suffering
• cost less than treating disorders
• laws to stop it going to far

Question 4

embryo screening against

Answer 4

• implies that people with genetic problems are undesirable
• lead to designer babies
• screening is expensive