AP Biology / Unit 7: Natural Selection
7.11 Variations in Populations
Notes
Genetic diversity helps populations survive environmental change.
- Low diversity (like in cloned crops) increases risk from disease.
Practice
Why are populations with low genetic diversity at risk?
Less raw material for selection.
The Irish potato famine was worse because:
One susceptible variety.
Genetic diversity comes from:
New alleles and new combinations.
Ready for more? Take the Unit 7 test.