A breeder selects a stallion with a calm temperament to father many ponies. In later generations, some of the stallion’s descendants are bred with other descendants of the same stallion.
An inherited disorder becomes more common in the pony population.
Explain how this breeding programme could have increased the likelihood of the inherited disorder.
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.