Speciation

Question 1

What is differential reproductive success in a population?

Answer 1

Not all individuals are as likely to reproduce as each other

Question 2

What is natural selection?

Answer 2

Frequency of the beneficial allele increases from generation to generation

Question 3

What is stabilising selection?

Answer 3

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

Question 4

When does stabilising selection occur?

Answer 4

When the environment isn’t changing and it reduces the range of the possible phenotypes

Question 5

What is directional selection?

Answer 5

Individuals with alleles for characteristics of an extreme type are more likely to survive and reproduce

Question 6

When does directional selection occur?

Answer 6

In response to an environmental change

Question 7

What is speciation?

Answer 7

Development of a new species

Occurs when pops of the same species become reproductively isolated

Question 8

How does the frequency of an allele within a population change?

Answer 8

Allele that codes for a characteristic that affects the chances of an organism surviving is removed