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Edexcel IAL Biology 2.17 Genetic screening uses and implications

Identify who is screened and what result is obtained, then connect carrier status or test outcome to the informed choice and its population consequence.

Syllabus
First assessment 2019
Course
Biology YBI11
Level
AS

Exam points

  • Explain how carrier screening identifies couples at risk of an inherited disorder.
  • Apply PGD, IVF or prenatal testing to a stated reproductive decision and outcome.
  • Explain how screening changes diagnosis or disorder frequency using case evidence.

2.17—Genetic screening uses and implications question 1

[Maximum number: 3]

Cystic fibrosis is an inherited disorder.

The graph shows the number of babies with cystic fibrosis per 10000 births in one country, from 1990 to 2008.

Number of babies with cystic fibrosis per 10000 births

Figure for Question 2.17—Genetic screening uses and implications question 1 — Edexcel A-Level Biology AS

Explain how the identification of carriers, using genetic screening, could have contributed to the downward trend shown in this graph.

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