What we get then, from the confluence of all genetic and environmental effects is a distribution of phenotypes, for a given population: z, Frequency(z) z Evolution is driven by genetically based fitness differences: = h2 s Δz change in population mean of a trait Δz – h2 degree of trait similarity among relatives – s trait difference between reproducers and population at large – Consider a population with a distribution of trait (pop “A”) values… Frequency Fitness trait value (z) Now consider a second population (pop “B”)… Frequency Fitness trait value (z)
What we get then, from the confluence of all genetic and environmental effects is a distribution of phenotypes, z, for a given population: Frequency(z) z Evolution is driven by genetically based fitness differences: Δz = h2 s Δz – change in population mean of a trait h2 – degree of trait similarity among relatives s – trait difference between reproducers and population at large Consider a population (pop “A”) with a distribution of trait values… Frequency Fitness trait value (z) Now consider a second population (pop “B”)… Frequency Fitness trait value (z)
2016%20Lecture%2003%20-%20Evolutionary%20origin%20and%20maintenance%20of%20biodiversity.docx