Evo Last Third Material

Evolution***Biology L318***Fall 2011
Study Guide for examination 3

1. Explain how migration can maintain genetic variation indoors a population? Describe a scenario where migration could (a) hinder rendering of population and (b) facilitate adaptation of a population. How would these scenarios be influenced by population size.

2. Explain to a friend or relative, who doesnt brace a biology background, what a G-matrix is and how it useful for predicting the brusk and long term answer of population to selection.

3. Describe how you would attest a trait is (a) adaptive and (b) an adaptation. Give two reasons why an adaptive trait may not be an adaptation.

accommodative trait increases the fitness of its bearer (part 2 of the syllogism)

Adaptation indication of an organism that breakd via NS for its current function (all parts of the syllogism)

It is much harder to leaven that a trait is an adaptation (need to show an evolutionary result to selection) than it is adaptive (need to show selection). Adaptive trait may not be an adaptation:
Not all adaptive traits have evolved for their current function or any function at all
Some adaptive traits are non-genetic

4. What is phenotypic plasticity? What is a reaction norm?



How can you have phenotypic plasticity but no genotype-by-environment interaction? What is adaptive plasticity?

phenotypical plasticity ability of an organism to change its phenotype in response to changes in the environment

Reaction norm pattern of phenotypic air of a single genotype across a orbit of environments

Adaptive plasticity genotype has capacity to produce diametrical phenotypes, suitable for different environmental conditions

If a non-genetic trait increases fitness and the reaction norm varies among genotypes, then plasticity itself can evolve and perhaps the plasticity is an adaptation to the environment.

5. How would you use a development to determine whether the evolution...If you want to get a full essay, swan it on our website: Ordercustompaper.com



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