What is a mutation?
A change in the DNA of an organism
A change in the way an organism looks
A change in the way an organism behaves
Which of these could increase the rate of mutation in DNA?
A balanced diet
Ionising radiation
Regular exercise
What causes cystic fibrosis?
A virus
A recessive allele
A dominant allele
The allele for cystic fibrosis is recessive and can be represented by the letter f. Which of these genotypes represents a person suffering from cystic fibrosis?
FF
Ff
ff
What term can be used to describe a person who is heterozygous for the cystic fibrosis allele?
Sufferer
Unaffected
Carrier
What is the probability that the offspring of heterozygous parents for the cystic fibrosis allele will be carriers of the allele like their parents?
25%
50%
75%
A child is born to parents who already have one child with cystic fibrosis. The second child does not suffer from the disease. What could her genotype be?
Ff or ff
FF or Ff
FF or ff
Which of these diseases could be treated by gene therapy?
Influenza
Tuberculosis
Cystic fibrosis
Which of these is a method used to replace faulty alleles in cystic fibrosis sufferers?
Pills
Inhaling a liposome
Ointment
Which of these is a disadvantage of gene therapy?
It is not a long term solution
It does not work
It has serious side effects