Researchers compare DNA from people with an inherited disorder and people without it. They also compare DNA from living people with DNA from ancient human remains.
They find a DNA variant more frequently in people with the disorder and several shared variants between one living population and the ancient remains.
Which conclusion is justified?
The first result proves the variant causes the disorder; the second can support shared ancestry.
The first result identifies a possible disease link; the second can support shared ancestry.
The first result proves the variant causes the disorder; the second proves identical genomes.
The first result identifies a possible disease link; the second proves identical genomes.
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.