Chapter 9 Definitions Flashcards
(8 cards)
1
Q
Define gene.
A
Sections of a DNA that codes for proteins.
2
Q
Define population
A
Group of organisms of the same species living together
3
Q
Define Gene Pool and gene frequency
(2M)
A
Sum of all the alleles
How often the allele of the gene occurs
4
Q
Define evolution. Hence, state 2 ways evolution can take place.
A
The change in characteristics in the population over time.
- Genetic drift
- Natural selection
- Mutation
- Gene Flow/Migration
5
Q
Define mutation
A
Random changes in the DNA sequence that produces new alleles which produces new characteristics.
6
Q
Define genetic drift
A
The change in allele frequency by chance.
7
Q
Define Migration
A
The movement of the alleles
8
Q
Define natural selection
A
Change in the composition of the gene pool due to selective environmental pressures
