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Cards In This Set
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What is evolution?
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changes in the allele frequencies or genotype
frequencies of a population over time.
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What is population?
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a group of interbreeding species members.
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What is a gene pool?
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all of the genes possessed by an interbreeding
population.
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What is a genotype?
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the genetic make-up of one individual. In the population below, “AA”, “Aa” and “aa”
are examples of genotypes.
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What is an allele?
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a particular variant of a gene. In the population below, “A” and “a” are
alleles.
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The simulatior we used in lab does not allow for what 4 things?
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Mutation, immigration, and emmigration, and random mating
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What can you control with the simulator we used in lab?
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Initial genotype frequencies, natural selection genotype viability (an genotype's ability to survive when selected against an environmental factor), reproduction sucess, and the population size.
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If you have the frequency of the allel "A", how do you determine the frequency of the alternate allel "a"?
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A+A=1
Therefore a=1-A |
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Of two populations (control and an experiment) which is closer to being in Hardy- Weinberg equilibrium?
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Whichever stayed the most similar (as in final genotype frequency) over the two runs.
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If AA and Aa mosquitos have a high natural selection genotype viability and aa has a low natural selection genotype viability, what happens to the frequencies of the AA, Aa and aa genotypes? Does the frequency ever go to zero?
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AA increases
Aa decreases aa decreases a lot because its recessive, it will never touch zero tho because as long as Aa exists, aa can exist |
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How do you calculate the gene pool size?
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Gene pool size is just the # of alleles in a population
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How do you determine the frequency of the A or a allele?
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# of As or as/ (# of allels/genepool)
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How do you determine how many indivudals there are in a population?
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You count the # of genotypes
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How do you determine the frequency of the AA, Aa, or aa genotype?
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# of AA, Aa, or aa genotypes/ (# of genotypes)
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1.In a population that strictly meets the Hardy Weinburg criteria for genetic equilibrium at all times, how many varients are there that control height?
2. if the Frequency of H is 0.7, what is the frequency of h? 3. If the population has 1000 members, how many have the HH, Hh, and hh genotypes? |
1.Two, H and h
2. H+h=1, so h=1-H, so h=1-(0.7), so h=0.3 3. HH= 490 (freqH*freqH)*1000-> (.7*.7)*1000 Hh= 210 (freqH*freqh)*1000->(.7*.3)*1000 hh= 90 (freqh(freqh)*1000->(.3*.3)*1000 |
