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Edexcel GCSE Biology Topic 3 Genetics overview quiz quiz

12questions. Pick an answer and you'll see why right away.

  1. How many cells does meiosis produce, and how do they compare genetically?

  2. Which is an advantage of asexual reproduction?

  3. In DNA, which bases pair together?

  4. What is the genome of an organism?

  5. How many DNA bases code for one amino acid?

  6. A pea plant is short, where tall (T) is dominant to short (t). What must its genotype be?

  7. Two heterozygous brown mice (Bb) are crossed, where brown (B) is dominant to white (b). What ratio of brown to white offspring is expected?

  8. How is the sex of a human determined?

  9. In the ABO blood groups, the alleles for A and B are codominant. What does this mean for a person with both alleles?

  10. Which of these is an example of purely environmental variation?

  11. Why do most mutations have no effect on the phenotype?

  12. What was an outcome of the Human Genome Project?