Factors that effect MICROevolution

What are the 3 major factors that alter allele frequencies & bring about most evolutionary change? Select all that apply.

• Natural Selection

• Heritability

• Genetic Drift

• Gene Flow

What is Natural Selection?

• Changes in gene pool of a population due to chance alone

• Loss or gain of alleles in a population due to migration of fertile individuals or gametes btw populations

• Differential success in reproduction from interaction w/ their environments which results in certain alleles being passed to next generation more

What are the two essential things needed for natural selection to occur?

• High mutation rate

• There are heritable variations in the population

• One of the variations must give individuals w/ that trait a selective advantage over others

• There is a small population

What is Artificial Selection?

• Humans select organisms for a phenotypic trait

• Robots select organisms for a phenotypic trait

• Organisms are naturally selected for a phenotypic trait

What does Evolutionary Theory NOT account for?

• Species diversity

• Adaptations

• Large population sizes

• Origins and relationships of organisms

What is the current understanding of Evolution?

• Changing number of organisms in a population

• Characteristics of living things that have changed over time

• The mutations that occur

• The changing diversity in an ecosystem

Which is the MAIN mechanism for Evolution?

• Natural Selection

• Genetic Drift

• Gene Flow

• Bottleneck Effect

Which type of Natural Selection is this?

• Stabilizing Selection

• Directional Selection

• Disruptive Selection

• There was no natural selection that occured

Which type of Natural Selection is this?

• Stabilizing Selection

• Directional Selection

• Disruptive Selection

• There was no natural selection that occured

Which type of Natural Selection is this?

• Stabilizing Selection

• Directional Selection

• Disruptive Selection

• There was no natural selection that occured