Natural Selection
Scenario: Pesticides were accidently spilled in the
population’s only water supply. It turns out that individuals
represented by red dots are genetically more resistant to
the pesticides than other organisms. What is this
resistance called?
Definition:
Real World Example:
Comparison:
How does the original population compare with the
population many generations later?
Mutations
Scenario: A mutation occurs during gamete production in
one of the individuals. This mutation causes the offspring of
that individual to be a different color. This did not hurt or
help the individual with the mutation.
Definition:
Real World Example:
Comparison:
How does the original population compare with the
population many generations later?
Gene Flow
Scenario: A few organisms from a
neighboring population move into the
area and begin breeding with the original
population.
Definition:
Real World Example:
Comparison:
How does the original population
compare with the population many
generations later?
Genetic Drift
Scenario: A random lightning strike kills all of the
organisms living within the gray area.
Definition:
Real World Example:
Comparison:
How does the original population compare with the
population many generations later?
Artificial Selection
Scenario:
Humans breed the green and blue organisms
more often than the red because they sell
for more money. Owners of these pets tend
to release them back into the wild as they
get older and become more aggressive
Definition:
Real World Example:
Comparison:
How does the original population compare with
the population many generations later?
Non-Random Mating
Scenario:
For some unknown reason, mating within this
population became non-random. It is
observed that red individuals begin mating
only with other red individuals.
Definition:
Real World Example:
Comparison:
How does the original population compare
with the population many generations later?
Reproductive Isolation
Scenario:
The habitat where the organisms lived had a
road build through the middle of the area.
This split the habitat into two regions.
Definition:
Real World Example:
Comparison:
How does the original population compare
with the population many generations later?
Genetic Recombination
Definition:
Limits to Models
Definition: