Why genetic diversity is the ultimate insurance policy for life
In short: A species' survival depends on its internal variety. This video breaks down how genetic diversity functions as a biological safety net, allowing populations to adapt to shifting environments and resist new diseases.
Genetic diversity is defined by the variation in alleles within a gene pool. High diversity is critical because it provides the raw material for adaptation; when environments change or new pathogens emerge, a diverse population is more likely to contain individuals with the traits necessary to survive.
The video explores two primary ways to measure this diversity. While observing physical traits is a common starting point, it is often limited by environmental influences and polygenic traits. For more precision, scientists compare molecular structures, specifically DNA base sequences, mRNA sequences, and the amino acid sequences of proteins.
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Sources
- Summary by Intellect · source: A-Level Biology - Biodiversity: Genetic Diversity - What It Is | How to Measure It (2027/28 exams)
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