Natural Selection Review H

What is the main focus of microevolution?

• Large scale changes

• Single population changes

• Ecosystem changes

• Global changes

What is the main focus of stabilizing selection?

• Increasing diversity

• Maintaining average traits

• Promoting extreme traits

• Reducing average traits

What does the diagram in the image represent?

• The increase of extreme traits

• The decrease of average traits

• The effect of stabilizing selection

• The effect of disruptive selection

What is the primary outcome of stabilizing selection on a population?

• Increased variation

• Reduced variation

• No change in variation

• Random variation

What is the key characteristic of stabilizing selection?

• Promotes extreme traits

• Favors average traits

• Eliminates average traits

• Increases trait diversity

What does allele frequency show?

• How many alleles are in a gene pool

• How frequently an allele appears in the gene pool

• How many individuals have a certain trait

• How many traits are in a population

What is the relationship between allele frequency and trait commonality?

• Higher frequency means less common trait

• Higher frequency means more common trait

• Frequency does not affect trait commonality

• Lower frequency means more common trait

Which of the following is true about allele frequency?

• It is the same for all alleles

• It varies depending on the allele

• It is always high

• It is always low

What does the gene pool consist of?

• Only dominant alleles

• Only recessive alleles

• All alleles of all individuals in a population

• Only alleles of a single individual

How many recessive alleles (r) are there in the population?

• 100

• 200

• 300

• 400