A farmer replaces a genetically varied crop with clones of one high-yielding plant. The parent plant is susceptible to a newly introduced pathogen.
Which prediction is most reasonable?
Yield may be more uniform, but many plants may share susceptibility to the pathogen.
Yield must be lower in every field, because cloned plants have fewer genes than their parent.
Yield must be greater in every field, because cloned plants cannot differ in their growth.
Yield may be more uniform, but cloning should produce new resistance alleles in many plants.
44 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.