Genetics: From Genes to Genomes, 5th edition
5th Edition
ISBN: 9780073525310
Author: Leland H. Hartwell, Michael L. Goldberg, Janice A. Fischer, Leroy Hood, Charles F. Aquadro
Publisher: McGraw-Hill Education
expand_more
expand_more
format_list_bulleted
Concept explainers
Textbook Question
Chapter 20, Problem 11P
It is the year 1998, and the men and women sailors (in equal numbers) on the American ship the Medischol Bounty have mutinied in the South Pacific and settled on the island of Bali Hai, where they have come into contact with the local Polynesian population. Of the 400 sailors that come ashore on the island, 324 have MM blood type, 4 have the NN blood type, and 72 have the MN blood type. Already on the island are 600 Polynesians between the ages of 19 and 23. In the Polynesian population, the allele frequency of the M allele is 0.06, and the allele frequency of the N allele is 0.94. No other people come to the island over the next 10 years.
a. | What is the allele frequency of the N allele in the sailor population that mutinied? |
b. | It is the year 2008, and 1000 children have been born on the island of Bali Hai. If the mixed population of 1000 young people on the island in 1998 mated randomly and the different blood group |
c. | In fact, 50 children have MM blood type, 850 have MN blood type, and 100 have NN blood type. What is the observed frequency of the N allele among the children? |
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solutionStudents have asked these similar questions
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…
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.
Why do scientists believe that the sickle-cell trait has not evolved out of the human population yet considering how deadly it is to be homozygous for the sickle cell gene?
Chapter 20 Solutions
Genetics: From Genes to Genomes, 5th edition
Ch. 20 - Choose the best matching phrase in the right...Ch. 20 - When an allele is dominant, why does it not always...Ch. 20 - A population with an allele frequency p of 0.5 and...Ch. 20 - Prob. 4PCh. 20 - Which of the following populations are at...Ch. 20 - A dominant mutation in Drosophila called Delta...Ch. 20 - A large, random mating population is started with...Ch. 20 - Prob. 8PCh. 20 - Prob. 9PCh. 20 - Two hypothetical lizard populations found on...
Ch. 20 - It is the year 1998, and the men and women sailors...Ch. 20 - Prob. 12PCh. 20 - In 1927, the ophthalmologist George Waaler tested...Ch. 20 - Prob. 14PCh. 20 - A gene has two alleles A frequency = p and a...Ch. 20 - Some people can taste the bitter compound...Ch. 20 - Androgenetic alopecia pattern baldness is a...Ch. 20 - Why is the elimination of a fully recessive...Ch. 20 - Tristan da Cunha is a group of small islands in...Ch. 20 - Small population size causes genetic drift because...Ch. 20 - Prob. 21PCh. 20 - A mouse mutation with incomplete dominance t =...Ch. 20 - In Drosophila, the vestigial wings recessive...Ch. 20 - Prob. 24PCh. 20 - You have identified an autosomal gene that...Ch. 20 - In Europe, the frequency of the CF allele causing...Ch. 20 - An allele of the G6PD gene acts in a recessive...Ch. 20 - Explain why evolutionary biologists monitor...Ch. 20 - What is the most straightforward evidence at the...Ch. 20 - In March 2013, the American Journal of Human...Ch. 20 - If you go back 40 generations into your biological...Ch. 20 - In Fig. 21.17, to what part of the world does...Ch. 20 - Predict the DNA sequences at the four nodes...Ch. 20 - A cladogram not drawn to scale for the taxonomic...Ch. 20 - As noted in Fig. 21.22, humans now living in...
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.Similar questions
- 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).arrow_forwardHumans who are born homozygous for the recessive sickle cell allele die of sickle cell anemia, while those who are heterozygous are resistant to malaria. 5% of the population of the Congo are homozygous recessive for the sickle cell allele. What percentage of the population is resistant to malaria?arrow_forward2) The year is 2050. The climate has continued to warm. Areas in northern Canada and Alaska are without snow or ice; the average annual temperature has risen and previously snow-covered areas are now shrub land and some temperate forests. What effect would such a climatic change have on the gene pool of the rabbits? All BUT ONE could apply. A) The allelic frequency has most likely shifted to 85% GG and 15% gg. B) The dominant allele in the gene pool would become G, the previously rare allele. C) The allele for white, g, would be scarce and perhaps nonexistent in the population. D) White rabbits would be at a disadvantage in terms of camouflage and would likely fall prey to predators.arrow_forward
- Voles (Microtus ochrogaster) were trapped in fields in southem Indiana and genotyped for a locus that encodes transferrin (a blood protein). The following numbers of genotypes were recorded, where T and T represent different alleles. [Tom McHugh/Science Source.] TETE TET; TFT; 407 170 17 Calculate the genotypic and allelic frequencies of the transferrin locus for this population.arrow_forwardI asked this question before but the solution was not correct and I'm really trying to figure out how to do this to get the correct answer. Please show work!DNA typing is used to compare evidence DNA (E) left at a crime scene to two suspects(S1 and S2). Suspect 1 is excluded by the evidence, but suspect 2 remains included. What isthe frequency of suspect 2's genotype if the allelic frequencies in the population are f(A1) =0.1, f(A2) = 0.2, and f(A3) = 0.7, and the population is at Hardy–Weinberg equilibrium?The answer is 0.49.arrow_forwardThe hemoglobin B gene (Hb) has a common allele (A) ofa SNP (rs334) that encodes the HbA form of (adult) hemoglobin and a rare allele (T ) that encodes the sicklingform of hemoglobin, HbS. Among 571 residents of a village in Nigeria, 440 were A/A and 129 were A/T, and 2were T/T individuals were observed. Use the χ2 test todetermine whether these observed genotypic frequencies fit Hardy–Weinberg expectations.arrow_forward
- What is the most common genotype of those, in the above family, who have died from malaria?  A.) HBAHBA B.) HBAHBS C.) HBSHBSarrow_forwardWhat is the percentage of people that get Wolf Hirschhorn disease. Does it affect a particular gender/culture/age group. Is it preventable? If so give me some facts like. By doing this you can drop your risk by _____percent. This can lead to increase risk. If it is genetic then talk about how common it is in the populationarrow_forwardConsider two blood polymorphisms that humans have in addition to the ABO system. Two alleles LM and LN determine the M, N, and MN blood groups. The dominant allele R of a different gene causes a person to have the Rh+ (rhesus positive) phenotype, whereas the homozygote for r is Rh− (rhesus negative). Two men took a paternity dispute to court, each claiming three children to be his own. The blood groups of the men, the children, and their mother were as follows:From this evidence, can the paternity of the children be established?arrow_forward
- What accounts for 100% of a population not being polymorphic? For instance, an entire South American Indian population being O blood type?arrow_forwardDihybrid crosses I only need the phenotypic ratioarrow_forwardWhen only a few individuals survive unfavorable times, thereby losing a majority of genotypes in the next generation, it is referred to asarrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
- Human Biology (MindTap Course List)BiologyISBN:9781305112100Author:Cecie Starr, Beverly McMillanPublisher:Cengage Learning
Human Biology (MindTap Course List)
Biology
ISBN:9781305112100
Author:Cecie Starr, Beverly McMillan
Publisher:Cengage Learning
How to solve genetics probability problems; Author: Shomu's Biology;https://www.youtube.com/watch?v=R0yjfb1ooUs;License: Standard YouTube License, CC-BY
Beyond Mendelian Genetics: Complex Patterns of Inheritance; Author: Professor Dave Explains;https://www.youtube.com/watch?v=-EmvmBuK-B8;License: Standard YouTube License, CC-BY