Reduced genetic variation
What Reduced genetic variation means in Combined Science GCSE, as defined for AQA.
Definitions of Reduced genetic variation
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Reference: AQA
A result of selective breeding using a small number of closely related parents, meaning a breed may be less able to resist new diseases or environmental changes.
Only a small number of parents contribute to each generation, which can make a breed more vulnerable to disease or environmental change.
Topics that use Reduced genetic variation
- Selective breeding (AQA GCSE)
Related terms
- artificial selection
- Artificial selection by humans
- change in allele frequency over generations
- Desired characteristic
- Inbreeding
- Inheritance of harmful recessive alleles
- Production of true-breeding populations
- Repeated breeding over generations
Using Reduced genetic variation in the exam
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