3.29 Species Variation

Notes


Variation = differences in phenotype of individual (possible to measure and show in graphic form)

Individual phenotype = Genotype + Modified by environment

Variation in Population = V P.genotype + V P.environment

-> Differences in Phenotypes of Species (appearance) = different genotypes + different habitats

Situations

1) Discontinuous Variation in Population/Species (GENOTYPE)

Variation in Genotype ONLY
-> Blood groups (O, A, A/B)

2) Continuous Variation in Population/Species (GENOTYPE + ENVIRONMENT)

Variation in Genotype + Environment
-> Height in humans = genes for height + diet

3) Variation in Population/Species (ENVIRONMENT)

Variation in Environment ONLY
-> Language spoken (not defined by genes at all) -> NOT INHERITABLE