evolgen bolker - 1 Evolutionary genetics Overview of terms...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: 1 Evolutionary genetics Overview of terms (micro- and macroevolution) Population genetics and Hardy-Weinberg equilibrium Exceptions to H-W: mutation, drift, gene flow, assortative mating natural selection Micro- and macroevolution microevolution : a change in the gene pool (allele frequencies) of a population over successive generations macroevolution : the origin of new taxonomic groups (cladogenesis) [Campbell] plus modification of species ( anagenesis ) and extinction Micro- and macroevolution (2) speciation (the formation of new species) is the bridge between these two levels, and the reason that we have taxonomy (species, genus, family, ...) at all Today: population/evolutionary genetics 2 From genetics to evolution Darwin didnt know the mechanism of inheritance (didnt rule out Lamarckian inheritance) Mendels work rediscovered in 1900 Blending inheritance was a big problem! Variability would disappear X = ? What happens if "red" is dominant and the red parent is heterozygous (Aa)? ` ` ` Mendelian genetics preserve variability Population genetics: definitions Remember: phenotype, genotype, allele, locus, homozygous, heterozygous, dominant, recessive A population is a localized group of individuals capable of interbreeding and producing fertile offspring A gene pool consists of all the alleles for all loci in a population A locus (or allele) is fixed if all individuals in a population are homozygous for the same allele (0 or 100% frequency) Mendelian vs. quantitative traits Mendelian traits are discrete (yes/no, black/white): e.g. eye color (sort of), sex Quantitative or polygenic traits are continuous (skin color, height, weight, etc.) more complicated but the evolutionary ideas are similar 3...
View Full Document

This note was uploaded on 04/24/2008 for the course BSC 2010 taught by Professor Bowes during the Spring '08 term at University of Florida.

Page1 / 8

evolgen bolker - 1 Evolutionary genetics Overview of terms...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online