Devil of a Disease Case Study Slides

2012

Goals for the Day1.Put the ideas of the theory of

Evolution by Natural selection to work.

2.Be able to write a testable hypothesis & experiment to go along with it.

3.Understand the importance of genetic variability

Question of the DayWhat needs to be present in a population for evolution by natural selection to occur?

Hint: We talked about ways we increase & decrease this

Case Study:Devil of a Disease

Devil of a DiseasePart I

Devil of a DiseasePart I

Immune SystemSelf vs. Non-self

Goals for the Day1.Be able to evaluate possible

consequences of different conservation actions for species.

2.Put the ideas of the theory of Evolution by Natural selection to work.

3.Understand and be able to describe the importance of genetic variability

Question of the DayIf natural selection needs variation to act on, what is the problem with genetically similar individuals.

Genetic DiversityGenetic Drift – changes in the

frequency of a gene in a population due not to mutation or natural selection, but due to chance.

Founder effect – small numbers of individuals are isolated from a larger population

Genetic DiversityPopulation/Genetic Bottleneckan evolutionary event in

which a significant percentage of a population or species is killed or otherwise prevented from reproducing, and the population is reduced by 50% or more, often by several orders of magnitude.

Genetic DiversityPopulation/Genetic BottleneckPopulation bottlenecks

increase genetic drift, due to reduction in population size.

They also increase inbreeding due to the reduced pool of possible mates

Case Study:Devil of a Disease

Part III Proposals1. Genetic Engineering2. Separate devils with tumors3. Find a cure4. Breed healthy or sick individuals in

captivity5. Semi-wild fenced off enclosures for

populations6. Kills devils with tumors

Part III Proposals1. Genetic Engineering

Pros Cons

Part III Proposals2. Separate devils with tumors

Pros Cons

Part III Proposals3. Find a cure

Pros Cons

Part III Proposals4. Breed healthy or sick individuals in captivity

Pros Cons

Part III Proposals5. Semi-wild fenced off enclosures for populations

Pros Cons

Part III Proposals6. Kill devils with tumors

Pros Cons

You are the manager! Write a ½ page

explanation of which strategy or combination of

strategies you would employ and why.

1. Genetic Engineering

2. Separate devils with tumors

3. Find a cure

4. Breed healthy or sick individuals in captivity

5. Semi-wild fenced off enclosures for populations

6. Kills devils with tumors