150 likes | 379 Views
The Process of Microevolution. Selection: Directional, Stabilizing, and Disruptive Selection Microevolution vs. Macroevolution Microevolution : change in allele frequency Macroevolution : formation of new species. Microevolution.
E N D
The Process of Microevolution Selection: Directional, Stabilizing, and Disruptive Selection Microevolution vs. MacroevolutionMicroevolution: change in allele frequencyMacroevolution: formation of new species
Microevolution The environment selects the best traits in the form of alleles that are advantageous for the given conditions i.e. the ability to digest a new food, or a new skin pigment may allow an organism to blend in with its environment Genotype = genetic make-up, what alleles an organism has Phenotype = appearance, what it looks like
Examples of Microevolution Case 1: English Pepper Moth Case 2: Mystery Predator The common denominator in each of these cases is the change in the alleles of a given gene or set of genes If there is a change in the frequency of the allele(s), then there will be a change in the genotype and phenotype of the population
English Peppered Moth Before industrial revolution After industrial revolution
The “M and M” Predator • Showing effects of different M & M colors surviving over time
Your turn!Be the chocolate predator… • Empty M and M bag on table. • Place colors on matching dots. • Place colors that don’t match (green) wherever you have space. • Now, EAT your M and M prey that don’t match (easiest to find)
Microevolution effects on populations over time Life history patterns = how species reproduce How successful each of the variations in species will be at reproducing Which M and M’s color will likely have a frequency change?