1. Gene Pool Objective 4

2. Evolution & Gene Pools A single organism does not evolve A single organism does not evolve One animal has the genes it was born with and they do not change One animal has the genes it was born with and they do not change Populations evolve Populations evolve Populations are multiple animals of a single species Populations are multiple animals of a single species Genetic variation is studied in populations Genetic variation is studied in populations All the genes (and alleles) in a population are called a gene pool All the genes (and alleles) in a population are called a gene pool

3. Gene Pool What is the gene pool for skin color in this population of frogs? What is the gene pool for skin color in this population of frogs? Gene Pool: Gene Pool: Green Green Purple Purple Red Red

4. Relative Frequency Relative Frequency is the number of times each trait or allele in a gene pool appears relative to the total population Relative Frequency is the number of times each trait or allele in a gene pool appears relative to the total population What are the Relative Frequencies for the skin color trait in this gene pool? What are the Relative Frequencies for the skin color trait in this gene pool? Relative Frequency: Relative Frequency: Green 12/15 Green 12/15 Purple 2/15 Purple 2/15 Red 1/15 Red 1/15

5. Gene Pool: fur color in a population of mice Sample Population 48% heterozygous black 36% homozygous brown 16% homozygous black Frequency of Alleles allele for brown fur allele for black fur allele for brown fur allele for black fur What is the relative frequency of the brown and black hair alleles? What is the relative frequency of the brown and black hair alleles? Brown: 30/50 Brown: 30/50 Black: 20/50 Black: 20/50

6. Darwin Awards “Thanks for removing your genes from the gene pool” “Thanks for removing your genes from the gene pool” http://darwinawardsdvd.com/ http://darwinawardsdvd.com/ http://darwinawardsdvd.com/