(melanocortin-1 receptor) Coat color in black bears is controlled, in part, by the Mclr locus. At a particular base along the gene, "A" encodes black or brown fur while "G" causes white fur. It was determined that within a population of bears, 42 were AA, 24 were AG, and 21 were GG. What is the frequency of the "A" allele in the population? O 0.14 O 0.38 O 0.47 0.62

(melanocortin-1 receptor) Coat color in black bears is controlled, in part, by the Mclr locus. At a particular base along the gene, "A" encodes black or brown fur while "G" causes white fur. It was determined that within a population of bears, 42 were AA, 24 were AG, and 21 were GG. What is the frequency of the "A" allele in the population? O 0.14 O 0.38 O 0.47 0.62

Human Heredity: Principles and Issues (MindTap Course List)

11th Edition

ISBN:9781305251052

Author:Michael Cummings

Publisher:Michael Cummings

Chapter19: Population Genetics And Human Evolution

Section: Chapter Questions

Problem 11QP: Using the HardyWeinberg Law in Human Genetics In a given population, the frequencies of the four...

See similar textbooks

Similar questions

Albinism in humans is a relatively rare recessive condition. Let the allele for normal pigmentation be A and the allele for albinism be a. Therefore, individuals with the genotypes AA and Aa are normally pigmented individuals and aa are albinos. Suppose that in the US the frequency of albinos is 1 in 10,000. Estimate the allele frequencies and the frequencies of AA, Aa and aa genotypes in the population. Show all your work, and clearly state your logic and any assumptions you make in estimating the frequencies.
The agouti gene determines coat colour in mice. Heterozygous mice have yellow coats, while homozygous dominant mice have black coats. However, having two copies of the recessive alleles is lethal. In a population of 2 000 mice, 1 082 mice have black coats. a) Calculate the frequency of each allele. Show all your work and express your answer as a value between 0 and 1 rounded to two decimal places. b) What percentage of the mouse population is expected to be carriers of the lethal allele? Show all your work and express your answer rounded to one decimal place. c) How many mice will die during fetal development? Show all your work and round your answer to the closest whole number.
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) Calculate the allele frequencies for this population. Show your work. b) Calculate the observed genotypic frequencies for this population. Show your work. c) Calculate the expected genotype frequencies if the population is in Hardy-Weinberg equilibrium. Show your work. d) Does this population appear to be at H-W equilibrium? Why or why not? (You do not need to analyze this statistically).
I've observed varying egg mimic sizes on female fins: large, small, or none. I found that this trait follows Mendelian genetics with a single locus having two alleles: BB (large mimic), Bb (small mimic), and bb (no mimic). During a recent collection trip, we gathered 211 males with large egg mimics, 156 with small mimics, and 28 with no mimics. Is the locus in Hardy-Weinberg equilibrium, and what's the expected frequency of the small egg mimic phenotype in this population? 1.Yes it is in HW equilibrium, expected = 0.07 2.Yes it is in HW equilibrium, expected = 0.39 3.No it is not in HW equilibrium, expected = 0.53 4.No it is not in HW equilibrium, expected = 0.20 5.No it is not in HW equilibrium, expected = 1.0
You observe a population of Japanese 4’oclock plants. These plants can display red, pink or white flowers. Plants with red flowers are homozygous dominant (RR); plants with white flowers are homozygous recessive (rr) and plants with pink flowers are heterozygous (Rr). Based on the following data: 35 plants with red flowers; 25 plants with white flowers; 40 plants with pink flowers. Show all work A) Calculate genotype frequencies of RR; Rr and rr in the population. B) Calculate the allele frequencies of R and r in the population.
Different species of crickets have distinct songs, andthey use these songs for mate recognition. Researcherscrossed two species of Hawaiian crickets (Laupala paranigra and L. kohalensis) whose songs are distinguishedby pulse rate (the number of pulses per second; Shaw etal., Molecular Ecology 16, 2007, 2879–2892.) Then, theymapped QTL in the F2 population derived from thiscross. Six autosomal QTL were detected. The mean traitvalues (pulses per second) at the three genotypic classesin the F2 for each QTL are shown in the table below,where P indicates the L. paranigra allele and K indicatesthe L. kohalensis allele.a. Calculate the additive (A) and dominance (D) effectsand the D/A ratio for each of the six QTL.b. Which of these QTL shows the greatest amount ofdominance?c. Which of these has the largest additive effect?d. The mean pulse rate for L. kohalensis is 3.72, and it is0.71 for L. paranigra. Do all six QTL act in the expecteddirection with the L. kohalensis allele conferring a…
Nieman-Pick Syndrome involves a defective enzyme, sphyngomylinase. It is usually fatal before the age of 3. The defective allele frequency is 0.01 in Ashkenazi populations. Let’s call the healthy allele A, and the lethal allele a. a) What is the frequency of allele A? Assuming Hardy-Weinberg equilibrium, how many people do you expect to have the three genotypes in a population of 10,000? b) AA:_______ c) Aa:________ d) aa:_________
An anthropologist discovered that Papa New Guineans tribes that had given up the customs of cannibalism also had an avid aversion to grapefruit. The ability to taste the horrid bitterness of PTC present in grapefruit respectively human brain tissue is due to a dominant allele. A small tribe of 637 Papa New Guinea hens was tested by population geneticists the following results were displayed. Tasters Non-tasters Total Males 171 86 257 Females 337 43 380 Total 508 129 637 Another tribe, still being cannibals, trespassed the territory of the other aforementioned tribe. They captured killed and feasted on the brains of 50 PTC tasting males respectively 19 females as to access their abilities seen as a gift from gods. Calculate the increase/decrease in percentage units or percent of respective allele frequency displayed in the remaining tribe?
Example: I go to a different population of fruit flies that have the same two alleles for eye-color. I suspect that the alleles occur in different frequencies in this second population. I sample 1000 flies and discover 10 that have brown eyes. What are the estimated frequencies of the "R" and "r" alleles in this population? Answer: Again, p2 + 2pq + q2 = 1. The term q2 = the relative frequency of homozygous recessive individuals, which corresponds to the ten brown-eyed flies I counted out of 1000 flies sampled. Thus, q2 = 10/1000 = 1/100. q = the square root of 1/100 or 0.1. Thus the frequency of "r" in this second population is 0.1 and the frequency of the "R" allele is 1 - q or 0.9. Problem 1: Phenylketonuria (PKU) is a disease caused by the build-up of the byproducts of metabolizing phenylalanine. It is caused by a defective, recessive allele. If a child is homozygous for this recessive allele, it will develop PKU. In the United States, PKU is detected in approximately 1 in 10,000…
In fruit flies, long wings (L) are dominant over short wings (l).In a population of 20 fruit flies, 5 have LL genotypes, 10 have Ll genotypes, and 5 have ll genotypes.Find the frequency ofa. long-winged fruit flies Answerb. short-winged fruit flies AnswerRecord your answer as a value between 0 and 1 rounded to two decimal places.
A genetic mutation that causes deafness in humans has an autosomal recessive pattern of inheritance. In a study of a population of 235 Turkish children, 48 displayed the recessive phenotype. The frequency of the heterozygous genotype in the population of Turkish children described above is?
Valyrians have alleles for gene A, controlling hair color. The dominant A (silver hair) and the recessive a (brown hair). In a population of 3600 individuals, 2000 have genotype AA, 1000 have genotype Aa, and 600 have genotype aa. 1-What is the frequency of allele A? (Express the answer as a decimal with 3 places, ie .123