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There are two Alleles, A1 and A1. Suppose that in generation 1, the frequency of allele A2 is 0.3 and the A2A2 homozygotes have a relative fitness of 0.25. The other two genotypes have a relative fitness of 1. Consider when there is inbreeding, therefore do not assume random mating. Instead, assume that the value of Wright's F statistic is 0.5, as it would be under complete self- fertilization a) What are the 3 frequencies of the genotypes? b) Describe why this would differ from values under random mating? c) What is the mean fitness of the population? g) explain how this mean fitness would be different than it would be under random mating?

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Nestor Rutherford
Nestor RutherfordLv2
28 Sep 2019

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Related questions

There are two Alleles, A1 and A1. Suppose that in generation 1, the frequency of allele A2 is 0.3 and the A2A2 homozygotes have a relative fitness of 0.25. The other two genotypes have a relative fitness of 1. Consider when there is inbreeding, therefore do not assume random mating. Instead, assume that the value of Wright's F statistic is 0.5, as it would be under complete self- fertilization a) What are the frequencies in generation 2 after one generation of selection? b) What is the frequency of A2 in generation 2 after one generation of selection. With nonrandom mating use your answer from a to determine p'. c) provide a brief, intuitive explanation for why the frequency of A2 was reduced more with inbreeding?

You’ve taken over the maintenance of a garden plot from an Austrian monk. The garden contains 867 purple pea plants (P) and 133 white pea plants (p). The purple phenotype is dominant. Assume for simplicity that each plant produces 10 gametes and that there is random mating. Each of the genotypes have the following fitness: WPP = 1.0, WPp = 0.6, Wpp = 0.4.

a. What is the frequency of each allele (P & p) in the gamete pool of generation 0?

b.What is the expected genotypic frequency under a HWE assumption (no selection)?

c. What is the expected genotypic frequency under selection?
d.What is the allelic frequency after selection?

I'm sorry for putting two questions on one request but I'mrunning out of uses for my subscription period. Please help!

1. Answer the following questions

(a –d) given the following information.

Please show your mathematical equations used and your work forfull credit, highlight your final answer:

Suppose we have one locus with two alleles with the followingabsolute viabilities

and initial allele frequencies.

Absolute viability:

AA = 0.95

AB = 0.95

BB = 0.65

Initial allele frequency:

Frequency A (p) = 0.2

Frequency of B (q) = 0.8

a. What are the relative fitnesses of the genotypes?

b. What is the average fitness in the population?

c. Assuming a general selection model what will the frequency ofboth alleles A and B be after one generation of selection?

d. What will the percent (%) change in the allele frequency of Abe after one generation of selection?

Will it be an increase or decrease change?

2. In wild Soay Sheep horn size is largely determined by asingle gene with two alleles. Let us assume for simplicity thatsheep with the dominant allele, H+, have large horns andsheep with recessive allele, Hs, have short horns. Belowis a table showing the relative reproductive success of individualswith the following genotypes. Assume relative reproductive successis our measure of relative fitness of genotypes.

Answer the following question (a-­e).

Relative Reproductive Success:

H+H+ is 1

H+Hs is 1

HsHs is 0.60

a. What is the selection coefficient (s) value against therecessive allele (Hs)?

b. What type (mode) of selection is occurring at this locus ANDwhat is the relationship of the relative fitnesses of thegenotypes?

c. You want to model selection at this locus to determine therate at which the advantageous allele frequency will change afterselection. What is the proper equation to use to determine theallele (H+) frequency change after one generation of selection?

d. Assume before selection the initial allele frequencies areH+=0.1 and Hs=0.9. What will the change in H+ frequency be afterone generation of selection against the Hs allele? Show yourmathematical work and highlight your final answer.

e. Draw a predicted graph of the rate of change for H+AND Hs over say 600 generations. I am interested in if you can (a)label your axes correctly, (b) indicate the initial allelefrequencies correctly, and (c) show the predicted trendlines for the change in allele frequencies over generations.You should make one graph with two lines (one for H+ and one forHs). Label your lines as H+ and Hs, This eans you do notneed to perform any math to make your plots.)

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