plumiUses of genetic screening: Edexcel International A Level Biology questions
Edexcel International A Level Biology past-paper questions on 2.7.1 Uses of genetic screening, 2019–2025, with mark schemes and examiner’s reports where available.
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Q8(c)
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All 12 questions on Uses of genetic screening, as a list
- January 2025, AS Unit 1, Q8(c) (6 marks): Genetic screening can be used by couples who are at risk of having a child with OI. The genetic screening options include pre‑implantation genetic diagnosis (PG
- October 2024, AS Unit 1, Q5(b)(ii) (6 marks): Pharmacogenomics analyses the genetic profile of individuals. This analysis is used to determine the appropriate doses of a drug for individual patients. Discus
- January 2024, AS Unit 1, Q7(b)(i) (1 mark): Calculate the predicted percentage decrease in the number of new cases from 2015 to 2025. (1) Answer %
- January 2024, AS Unit 1, Q7(b)(ii) (3 marks): Explain why the number of cases could fall. (3)
- June 2023, AS Unit 1, Q7(a) (4 marks): Phenylketonuria (PKU) is one genetic disorder that is screened for by prenatal testing. This disorder is inherited in a similar way to cystic fibrosis. Explain
- January 2022, AS Unit 1, Q4(c) (3 marks): Population carrier screening (PCS) is one type of genetic screening. This involves screening people who want a child to see if they are carriers of genetic diso
- October 2021, AS Unit 1, Q5(a) (2 marks): Explain how this data shows that there is a correlation between the age of the women and the miscarriage rate. (2)
- October 2021, AS Unit 1, Q5(b)(i) (2 marks): Explain the conclusions that can be made from these data about the causes of miscarriage. (2)
- October 2021, AS Unit 1, Q5(b)(ii) (3 marks): Explain why conclusions made using these data may not be valid. (3)
- October 2021, AS Unit 1, Q5(c) (3 marks): Discuss the implications of screening embryos for aneuploidy before implantation. (3)
- June 2021, AS Unit 1, Q2(c)(ii) (3 marks): There are two types of diabetes, Type I and Type II. The treatment for Type I diabetes is different from the treatment for Type II diabetes, so it is important
- January 2020, AS Unit 1, Q8(b)(i) (3 marks): Explain how the identification of carriers, using genetic screening, could have contributed to the downward trend shown in this graph. (3)
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