Snouters are small critters that live on bothsides of the Ohio River. A population on the north side of the OhioRiver is fixed for an allele for blue feet. The population on thesouth side of the river is fixed for an allele for pink feet.Twenty blue-footed snouters from the north and 80 pink-footedsnouters from the south colonize a newly formed island in themiddle of the river. Please calculate the following.
1. What are the genotype frequencies at thetime of colonization (Parental Generation, P1)? (Justthe colonizers before reproduction)
2. What are the allele frequencies at the timeof colonization (P1)? (Just the colonizers beforereproduction, N = 100)
3. What are the genotype frequencies of theoffspring of the next generation (First generation of offspring,F1 ), assuming random mating?
4. What are the allele frequencies of theoffspring of the next generation (F1)?
Heterozygotes have purple feet that aresusceptible to snouter purple-foot fungus that sterilizespurple-footed snouters (They cannot reproduce). Assume that theF1 generation above are the parents for the next set ofquestions.
5. Calculate the allele frequencies ofthe parents that can breed (F1 with no purple footedindividuals). Calculate the genotype and allele frequencies ofthe offspring (F2) in the secondgeneration assuming random mating (Hint: The sum of the allelefrequencies represented by the homozygotes are equal to 1, keepthis in mind when you calculate the allele frequency ofF1 as parents. It may help if you assume a populationsize for F1 prior to reproduction.)
6.Has evolution occurred? Why? If the purplefoot fungus were to continue on this island for severalgenerations, what color feet would most likely become fixed on theisland and why?
Snouters are small critters that live on bothsides of the Ohio River. A population on the north side of the OhioRiver is fixed for an allele for blue feet. The population on thesouth side of the river is fixed for an allele for pink feet.Twenty blue-footed snouters from the north and 80 pink-footedsnouters from the south colonize a newly formed island in themiddle of the river. Please calculate the following.
1. What are the genotype frequencies at thetime of colonization (Parental Generation, P1)? (Justthe colonizers before reproduction)
2. What are the allele frequencies at the timeof colonization (P1)? (Just the colonizers beforereproduction, N = 100)
3. What are the genotype frequencies of theoffspring of the next generation (First generation of offspring,F1 ), assuming random mating?
4. What are the allele frequencies of theoffspring of the next generation (F1)?
Heterozygotes have purple feet that aresusceptible to snouter purple-foot fungus that sterilizespurple-footed snouters (They cannot reproduce). Assume that theF1 generation above are the parents for the next set ofquestions.
5. Calculate the allele frequencies ofthe parents that can breed (F1 with no purple footedindividuals). Calculate the genotype and allele frequencies ofthe offspring (F2) in the secondgeneration assuming random mating (Hint: The sum of the allelefrequencies represented by the homozygotes are equal to 1, keepthis in mind when you calculate the allele frequency ofF1 as parents. It may help if you assume a populationsize for F1 prior to reproduction.)
6.Has evolution occurred? Why? If the purplefoot fungus were to continue on this island for severalgenerations, what color feet would most likely become fixed on theisland and why?
