BRAINCAKEFactors Affecting Genetic Biodiversity
Mutation of the DNA creates new alleles.
Interbreeding between different populations creates genetic diversity because there is gene flow i.e. alleles are transferred between the two populations. If the number of alleles decreases, biodiversity decreases.
Selective breeding and natural selection can reduce biodiversity.
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Key terms in this lesson
- natural selection
- The process by which organisms with advantageous alleles are more likely to survive and reproduce, passing those alleles to their offspring and changing allele frequency over time.
- gene
- A length of DNA that codes for a specific polypeptide.
More in Biodiversity
- Estimating Population Size
- Measuring Abiotic Factors
- Simpson's Index of Diversity
- The Importance of Genetic Diversity
- Measuring Genetic Biodiversity
- Human Influence of Biodiversity
- Deforestation
- Agriculture
All 33 lessons in Biodiversity · All OCR AS-level Biology topics