BIOL 301 Lecture Notes - Lecture 4: Daphnia, Heritability, Population Genetics
9 May 2020
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Document Summary
Is the capacity of an organisms to express different phenotypes under different environmental conditions. Aphids can develop wings when pressured; i. e. overcrowding or poor food resources. Higher predator density will trigger a helmet-like structure to develop on daphnia. Can even trigger a response in offspring still being carried by the mother. Sounds a lot like lamarck"s evolutionary thought, who described these traits as heritable. These non-genetic traits can be passed down to the next generation by teaching, rather than heritability. Amazonian parrots: two dialects of speaking from different regions/populations. Parents of northern dialect will only teach their offspring that dialect, and vice versa. There are also paternal effects, especially from the maternal side. Condition of parents has great effect on the. Condition of parents has great effect on the survivorship of offspring. Effects that parents have on their offspring"s phenotype without altering the genotype i. e. physiological condition of the mother, level of maternal care, amount of yolk in egg.
