9.4 - Natural Selection Flashcards
The steps involved in natural selection An example of natural selection in bacteria Directional and stabilising selection
1
Q
What is genetic diversity?
A
Total number of different alleles in a population
2
Q
What does genetic diversity lead to?
A
Variation in characteristics
3
Q
What is natural selection?
A
Process where advantageous traits become more common
4
Q
What are the steps of natural selection?
A
Variation
5
Q
What is an example of natural selection?
A
Antibiotic resistance in bacteria
6
Q
How does antibiotic resistance develop?
A
Random mutations
7
Q
What are the two types of selection?
A
Directional and stabilising
8
Q
What is directional selection?
A
Favors extreme phenotypes
9
Q
What is an example of directional selection?
A
Antibiotic resistance
10
Q
What is stabilising selection?
A
Favors average phenotypes
11
Q
What is an example of stabilising selection?
A
Human birth weight
