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4.3 Selective breeding and genetic modification

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Question 39

Two breeding programmes produced lines of quail with high egg production.

Line P was produced by repeatedly breeding a small number of closely related quail. Line Q was produced using a larger number of unrelated quail.

Both lines were kept under the same conditions. An infectious disease then spread through the quail.

quail linequail affected by the disease (%)
P76
Q24

Explain the difference in the percentages of quail affected by the disease.

[2]
Markscheme

4.3 Selective breeding and genetic modification Questions

  1. GCSE
  2. /Biology
  3. /4.3 Selective breeding and genetic modification

100 exam-style questions on Edexcel GCSE Biology 4.3 Selective breeding and genetic modification, covering 4.3.1 Selective breeding and its impact, 4.3.2 Tissue culture, 4.3.3 Genetic engineering overview, 4.3.4 Main stages of genetic engineering, 4.3.5 Advantages and disadvantages of GM organisms, 4.3.6 Agricultural solutions for a growing population, and 4.3.7 Evaluating genetic engineering and breeding. Each one has a worked solution and a mark scheme showing where the marks go.

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