Evolution

Drake Boggan

What is Evolution?

Evolution is change in the gene pool of population from generation to generation by such processes as mutation, natural, selection, and genetic drift

Evolution Terms

Gene- a unit of heredity that is transferred from a parent to offspring and is held to determine some characteristic of the offspring.


Gene Pool- the stock of different genes in an interbreeding population.


Gene Flow- the transfer of alleles or genes from one population to another. Immigration and Emigration can be described as the two types of gene flow.


Adaptation- a change or the process of change by which an organism or species becomes better suited to its environment.


Genetic Drift- variation in the relative frequency of different genotypes in a small population, owing to the chance disappearance of particular genes as individuals die or do not reproduce.


Natural Selection- the process whereby organisms better adapted to their environment tend to survive and produce more offspring. The theory of its action was first fully expounded by Charles Darwin and is now believed to be the main process that brings about evolution.

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Evolution Fingeres (See image above)

1/Thumb- Adaptations

-Organisms with genes not adapted to an environment will eventually be replaced changing the frequency and/or the gene pool


2/Index Finger- Gene Flow

-Organisms moving in and out of a population carry in and carry out genes changing frequency


3/Middle Finger- Mutations

-example: red hair mutates to green.... The new gene added effects the frequency


4/Ring Finger- Non-Random Mating

-If choosing a mate by appearance or location, they will eventually create a new generation changing the frequency


5/Pinky Finger- Genetic Drift

- in a small population, small things can make quite a big difference...if population shrinks, chance can take over and lead to evolution