Populations and Evolution

Question 1

What is a species?

Answer 1

-A group of similar organisms that can reproduce to make fertile offspring

Question 2

What is a population?

Answer 2

-A group of organisms of the same species living in a particular area at a particular time

Question 3

What is a gene pool?

Answer 3

-The complete range of alleles present in a population

Question 4

What are the conditions required for the Hardy-Weinberg principle?

Answer 4

-Large population
-No immigration
-No emigration
-No mutations
-No natural selection
-Random mating

Question 5

What are the two equations for the Hardy-Weinberg principle?

Answer 5

p+q=1
p^2+2pq+q^2=1

Question 6

What is intraspecific variation?

Answer 6

-Variation within a species

Question 7

What is stabilising selection?

Answer 7

-Individuals with alleles for characteristics towards the middle of the range are more likely to survive and reproduce

Question 8

What is directional selection?

Answer 8

-Individuals with alleles for a single extreme phenotype are more likely to survive and reproduce

Question 9

What is disruptive selection?

Answer 9

-Individuals with alleles for extreme phenotypes are more likely to survive and reproduce

Question 10

What is speciation?

Answer 10

-The development of a new species from an existing species

Question 11

Describe the process of allopatric speciation

Answer 11

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