CB ch 18 microevolution

A random change in allele frequencies over generations brought about by chance.

• genetic drift

• gene flow

Phenotypic forms at both ends of the range are favored and the intermediate forms are selected against.

• directional selection

• stabilizing selection

• disruptive selection

Tags

NGSS.HS-LS4-4

NGSS.HS-LS4-5

Cockroaches becoming increasingly resistant to pesticides is an example of

• disruptive selection

• genetic drift

• directional selection

• stabilizing selection

Tags

NGSS.HS-LS4-4

NGSS.HS-LS4-2

In the Hardy Weinberg equations the recessive phenotype frequency is represented by

• p

• q

• 2pq

• q²

All of the following can allow a population to evolve EXCEPT

• small population size

• natural selection

• mutation

• no sexual selection

Tags

NGSS.HS-LS4-4

NGSS.HS-LS4-2

Natural selection acts on alleles.

• True

• False

Tags

NGSS.HS-LS4-4

NGSS.HS-LS4-2

NGSS.HS-LS4-5

T5. What does the image represent?

• Founder effect
• Bottleneck effect
• Mutation
• Natural Selection

What type of selection is depicted in the picture where one phenotype is favored?

• stabilizing

• directional

• disruptive

Tags

NGSS.HS-LS4-4

If finches with large beaks and finches with small beaks increase in a population while finches with average sized beaks decreases, which pattern of natural selection has occurred?

• Directional selection
• Disruptive selection 
• Stabilizing selection

Tags

NGSS.HS-LS4-4

NGSS.HS-LS4-2

Which Hardy-Weinberg factor represents the frequency of heterozygous individuals in a population?

• p2
• 2pq
• q2
• p2 + 2pq

Tags

NGSS.HS-LS4-3