3.29

(differences in species' appearances)
• The phenotype of an individual is different because of their genotype which varies as a result of the varying environment
• 1 variation: In the first graph everyone falls into classes as a result of the variation of the genotype (nothing to do with the environment) e.g. blood groups. this is called discontinuous variation
• 2 variation: The variation in graph to is caused by the genotype AS WELL as the environment e.g. height. someone might inherit tall genes from their parents but the environment would always play a role in their height as well as their diet. this is called continuous variation
• 3 variation: the variation in a population is completely caused by the environment (no genotypes involved) e.g. the language spoken. this cannot be inherited