Chapter 13 Review

What other organism that we talked about in lecture showed the above pattern?

B. Pepper Moths

What can directional selection cause?

B. Speciation

When one extreme phenotype is selected against what is this called?

C. Directional Selection

What is a change in an individuals DNA?

C. Mutation

If these two groups of mice are isolated from each other long enough it can lead to?

C. Speciation

Why did frequency of the alleles in the moths change?

The environment changed.

What is the comparison of body structures (like forelimbs) between different species?

B. Comparative anatomy

What effect does the founder effect have on rare recessive alleles?

B. Increases their frequency.

Lamarck believed that?

B. Individuals could change their physical structures through use and then pass those changes on tho their offspring.

How does adaptive radiation lead to speciation?

B. Natural variation within a species eventually leads to a wide array of different species in their descendants.

What is gene flow?

B. The mixing of genes from different populations.

The pepper moths of England show what type of micro evolution?

D. Natural Selection

Which form of microevolution is generally the only one that is adaptive?

D. Natural Selection

What were Darwin's two observations about natural selection?

D. Overproduction and Individual Variation

Which of the following is not a cause of micro evolution?

E. None of the above

Which of the following is NOT true for the sickle cell allele in African Americans?

It is a valuable allele to possess when living in America.

What does adaptive mean?

Something that helps an organism or species survive and reproduce better.

When both extremes in a population are selected against what is this called?

Stabilizing selection

Why is gene flow happening in the U.S so much today?

people are coming to the us and remarrying

What is genetic exchange with another population?

B. Gene flow

According to evolutionary theory what do humans cats whales and bats have in common?

C. A mammal ancestor with arms and legs similar to all current mammals

How does disruptive selection cause speciation?

C. After a certain amount of time, if two groups of a species are separated they will each change and then recombined they will not choose to mate with each other again.

What is genetic drift called in a small isolated colony?

D. Founder effect

When intermediate forms are selected against what is this called?

Disruptive selection

You would know that the two mouse populations have become separate species because when individuals met;?

would mate if forced unable to reproduce

What form of micro evolution is illustrated by the nearly extinct cheetahs?

A. Genetic drift/bottle neck effect.

Which of the following is not one of the three basic ideas of natural selection?

All organisms evolved from bacteria.