Cystic fibrosis is a disorder of cell membranes. It is caused by a recessive allele.
Neither parent in one family has cystic fibrosis. Their first child has cystic fibrosis. Explain how this is possible.
Embryos produced by IVF can be screened for the cystic fibrosis allele before they are placed in the mother.
Give one argument in favour of screening embryos in this way.
Give one argument against screening embryos in this way.
76 exam-style questions on AQA GCSE Biology 6.1 Reproduction, covering 6.1.1 Sexual and asexual reproduction, 6.1.2 Meiosis, 6.1.3 Advantages and disadvantages of sexual and asexual reproduction, 6.1.4 DNA and the genome, 6.1.5 DNA structure, 6.1.6 Genetic inheritance, 6.1.7 Inherited disorders, and 6.1.8 Sex determination. Each one has a worked solution and a mark scheme showing where the marks go.