Chapter 3

Question 1

What is microevolution?

Answer 1

A short term evolutionary change in a species over a few generations.

Question 2

What is macroevolution?

Answer 2

Long term evolutionary changes some include millions of years and origins of new species.

Question 3

What is neo-Darwinism?

Answer 3

Darwin’s concept of natural selection.
Mendel’s ideas about heredity.
Defines a species in terms of “populations of organisms”

Question 4

What is Biological species?

Answer 4

Reproduce only with same isolated species.
Different species reproduce don’t have reproductive offspring.
Specific niche in nature.

Question 5

What is gene pool?

Answer 5

All of the genes in the bodies of all members of a given species (or a population of a species).

Question 6

What is Gene frequency?

Answer 6

How often variants of a specific gene occur within a population.

Question 7

What are Clines?

Answer 7

Patterns of gradually shifting frequency of phenotypic traits across populations over geographic space.

Question 8

What is race?

Answer 8

A sociocultural and historical construct that shapes people’s lives.

Question 9

What is gene flow?

Answer 9

Exchange of genes between two or more populations with overlapping gene pools.

Question 10

What are the 4 evolutionary processes?

Answer 10

Natural selection: best suited survive
Mutation: creation of a new allele for a gene
Gene flow: exchange of genes with others
Gene drift: random changes in gene frequencies from one generation to another due to sudden reduction in population size

Question 11

What is skin color?

Answer 11

An adaptive response shaped by natural selection to variation with ultraviolet radiation across the globe.