- Variation = differences that we can see in the phenotype of individuals. Possible to count/measure these differences in graphic form.
- Individual: Phenotype = Gene + Environment
- Variation: V(population) = V(genorype) + V(environment)
1. Variation in population entirely due to Variation in Genotypes. (e.g. Blood groups) - Discontinuous
2. Variation in population/species due to Variation in Genotype and are modified by the environment to form the distribution curve (e.g. height of individuals) - Continuous
3. Variation in population entirely due to the environmental variation. (e.g. Home language). Cannot be inherited.
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