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- Once upon a time there was a population of hippies living in an isolated commune called Gone. They had been there for generations, and all members were homozygous for a gene that gave them a preference for crafting necklaces out of green beads, so that every individual had the genotype GG at this locus. In another isolated commune, called Yonder, was a population of hippies that had a genetic propensity for making necklaces out of yellow beads, and everyone was homozygous for a different allele at the same genetic locus; their genotype was YY. Last year (prior to our current social isolating) everyone repaired their W buses, and a giant gathering in celebration of the 50th anniversary was held at the Oregon Country Fair. The next few questions will ask you about these two populations that came together at the fair. Genotype Observed Expected (0-E) (0-E)2 (O-E)?/E GG 81 79.2 81-79.2-1.8 1.82=3.24 3.24/79.2=0.04 12.96/105.6=0. GY 102 105.6 102-105.6=-3.6 -3.62=12.96 12 YY 37 35.2…Once upon a time there was a population of hippies living in an isolated commune called Gone. They had been there for generations, and all members were homozygous for a gene that gave them a preference for crafting necklaces out of green beads, so that every individual had the genotype GG at this locus. In another isolated commune, called Yonder, was a population of hippies that had a genetic propensity for making necklaces out of yellow beads, and everyone was homozygous for a different allele at the same genetic locus; their genotype was YY. Last year (prior to our current social isolating) everyone repaired their VW buses, and a giant gathering in celebration of the 50th anniversary was held at the Oregon Country Fair. The next few questions will ask you about these two populations that came together at the fair. If Gone had 12,000 adults before the gathering, and Yonder had 8,000, what is the frequency of the G allele in the adult population at The Country Fair? Keep in mind that…. In 1919, Calvin Bridges began studying an X-linkedrecessive mutation causing eosin-colored eyes inDrosophila. Within an otherwise true-breedingculture of eosin-eyed flies, he noticed rare variantsthat had much lighter cream-colored eyes. By intercrossing these variants, he was able to make a truebreeding cream-eyed stock. Bridges now crossedmales from this cream-eyed stock with true-breedingwild-type females. All the F1 progeny had red (wildtype) eyes. When F1 flies were intercrossed, the F2progeny were 104 females with red eyes, 52 maleswith red eyes, 44 males with eosin eyes, and14 males with cream eyes. Assume that thesenumbers represent an 8:4:3:1 ratio.a. Formulate a hypothesis to explain the F1 and F2results, assigning phenotypes to all possiblegenotypes.b. What do you predict in the F1 and F2 generations if the parental cross is between truebreeding eosin-eyed males and true-breedingcream-eyed females?c. What do you predict in the F1 and F2 generationsif the parental cross is…
- Tristan da Cunha is a group of small islands in themiddle of the Atlantic Ocean. In 1814, a group of 15British colonists founded a settlement on these islands.In 1885, 15 of the 19 males on the island were lost ina shipwreck. In the late 1960s, four cases of retinitispigmentosa, which progressively leads to blindness,were found among the 240 descendants of these settlers remaining on the island. The frequency of retinitis pigmentosa in Britain is about 1 in 6000. Explainthe high incidence of this disease on Tristan daCunha relative to that seen in Britain.An autosomal recessive disease affects /200 dogs and the population is in Hardy-weinlerg. a) what propornon of he poulanon are cauners for the disease? b) A carrrer dog and an unknown dog are randomy sevectedfrom the popuaron and thay have one offipring, what is the fosioi'ing the oříspring is a carrier for he disease?It is the year 1998, and the men and women sailors (inequal numbers) on the American ship the MedischolBounty have mutinied in the South Pacific and settledon the island of Bali Hai, where they have come intocontact with the local Polynesian population. Of the400 sailors that come ashore on the island, 324 haveMM blood type, 4 have the NN blood type, and 72 havethe MN blood type. Already on the island are 600Polynesians between the ages of 19 and 23. In thePolynesian population, the allele frequency of the Mallele is 0.06, and the allele frequency of the N allele is 0.94. No other people come to the island over thenext 10 years.a. What is the allele frequency of the N allele in thesailor population that mutinied?b. It is the year 2008, and 1000 children have beenborn on the island of Bali Hai. If the mixed population of 1000 young people on the island in 1998mated randomly and the different blood groupphenotypes had no effect on viability, how manyof the 1000 children would you expect…
- Which of the following mutations is only found in Haplogroup F? O T16223C O G16230A O T16304C O A16129G O C16311TA botanist studying water lilies in an isolated pond observedthree leaf shapes in the population: round, arrowhead, and scalloped.Marker analysis of DNA from 125 individuals showed theround-leaf plants to be homozygous for allele r1, while the plantswith arrowhead leaves were homozygous for a different allele atthe same locus, r2. Plants with scalloped leaves showed DNA profileswith both the r1 and r2 alleles. Frequency of the r1 allele wasestimated at 0.81. If the botanist counted 20 plants with scallopedleaves in the pond, what is the inbreeding coefficient F forthis population?A mountain region has a population of 5,000 mountain goats. You score these animals for the R locus and find that this locus has two alleles, R (dominant) and r (recessive). 3200 individuals are homozygous dominant, 1,600 are heterozygous, and 200 are homozygous recessive. A deadly virus infects all of the RR mountain goats in the population (above), killing all individuals of this genotype and leaving the population with only the rr and Rr mountain goats. a) Calculate the new allele frequencies for this population. Show your work. b) Calculate the new (observed) genotypic frequencies for this population. Show your work. c) Does this population still appear to be at H-W equilibrium? Why or why not? (You do not need to analyze this statistically).
- The pedigree for Queen Victoria of England, acarrier of hemophilia A, shows the transmission tosome of her descendants, including members ofmany royal families in Europe, such as Russia andSpain, but not Germany. Hemophilia A does notaffect anyone in the present British royal family.Can you explain why hemophilia A hasdisappeared from one family and appeared inothers?You visit a huge city with millions of people. If you were to start sampling the cystic fibrosis allele from one generation to the next, what should happen to its frequency over the next few generations, and why?The pedigree below shows the transmission of albinism (absence of skin pigment) in a human family. u pru ub of breas 3. 3 7. 8. egytoneria durl ert olt bns Helodmye eelU 3alodmya aeU A. What is the likely mode of transmission of albinism in this family? Why? vtinobi 오모오9 nee shu B. Using allelic symbols of your choice, identify the genotypes of the male and his two mates in generation I. C. What is the probability that female Il-2 is a heterozygous carrier of the allele for albinism?