Biology B1 - You and Your Genes - OCR 21st Century

These questions are taken out of the exam board's revision guide, meaning that they're all things you need to know.

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1. If you have 1 dominant and 1 recessive allele, which characteristic is shown?

  • They cancel out
  • Half of each
  • The dominant characteristic
  • The recessive characteristic
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2. What is weight determined by?

  • Environmental factors
  • Genes and environmental factors
  • Genes

3. What is an issue surrounding genetic testing?

  • Travel agents could refuse to let someone with alleles for a genetic disorder go on holiday because they could die abroad
  • Insurance companies could refuse to give life insurance to people with alleles for a genetic disease
  • It's expensive
  • Families might be upset

4. During IVF treatment, what is the process of testing embryos to see if they have a genetic disorder called?

  • Pre-pregnancy genetic diagnosis
  • Pre-implantation genetic diagnosis
  • Pre-birth genetic diagnosis
  • Pre-growth genetic diagnosis

5. Which one is NOT a symptom of Huntington's disease?

  • Chest infections
  • Poor concentration
  • Tremors
  • Clumsiness
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