GCSE Biology – Genetic disorders

Last updated: 03/07/2020
CCEA GCSE Science – Combined science foundation Genome, chromosomes, DNA and genetics GCSE Biology – Genetic disorders

Learning Objectives

-I can describe cystic fibrosis
-I can describe Huntington’s disease
-I can describe Down’s Syndrome

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  1. Current
  2. Review
  3. Answered

  1. What does recessive allele mean?

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  2. What does dominant allele mean?

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  3. What does carrier mean?

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  4. What type of condition is cystic fibrosis?

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  5. What does cystic fibrosis affect?

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  6. What is cystic fibrosis caused by?

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  7. What does cystic fibrosis cause?

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  8. What can cystic fibrosis cause?

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  9. Do both parents need to have cystic fibrosis for the child to have it?

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  10. How many parents must have the cystic fibrosis allele for the offspring to have it?

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  11. Why must both parents have the cystic fibrosis allele for the child to have it?

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  12. Why can offspring have cystic fibrosis without the parents having it?

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  13. Why can parents carry the cystic fibrosis allele without having cystic fibrosis?

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  14. If both parents are carriers, what is the chance of the child having cystic fibrosis?

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  15. If one parent is a carrier and the other has cystic fibrosis, what is the chance of the child having cystic fibrosis?

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  16. If one parent has cystic fibrosis and the other has no cystic fibrosis allele, what is the chance of the child having cystic fibrosis?

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  17. What type of disease is Huntington’s disease?

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  18. What is Huntington’s disease?

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  19. What type of cells does Huntington’s disease damage?

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  20. How is the recessive allele shown for Huntington’s disease?

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  21. How is the dominant allele shown for Huntington’s disease?

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  22. What combination of alleles will be needed for Huntington’s disease to be present?

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  23. What combination of alleles will be needed for Huntington’s disease to be present?

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  24. What is Down syndrome?

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  25. What type of disease is Down syndrome?

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