Genetics: Analysis and Principles
6th Edition
ISBN: 9781259616020
Author: Robert J. Brooker Professor Dr.
Publisher: McGraw-Hill Education
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Chapter 27, Problem 17CONQ
Summary Introduction
To review:
The significance of genetic drift in a small population and the reason for taking along time in a large population to cause allele fixation.
Introduction:
Genetic drift was proposed by Wright. It refers to the change in allele frequency in a population. Itcould cause the loss or fixation of allele over a long time. Itgetsinfluenced by the initial allele frequency and the
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What Is Random Genetic Drift?
Chapter 27 Solutions
Genetics: Analysis and Principles
Ch. 27.1 - A gene pool is a. all of the genes in a single...Ch. 27.1 - 2. In natural populations, most genes...Ch. 27.1 - A gene exists in two alleles designatedDandd. If...Ch. 27.1 - Prob. 4COMQCh. 27.2 - Which of the following is a factor that, by...Ch. 27.3 - 1. Darwinian fitness is a measure...Ch. 27.3 - 2. Within a particular population, darkly colored...Ch. 27.3 - 3. A population occupies heterogeneous...Ch. 27.3 - Prob. 4COMQCh. 27.4 - 1. Genetic drift is
a. a change in allele...
Ch. 27.4 - 2. Which of the following influences on genetic...Ch. 27.5 - Gene flow depends on a. migration. b. the ability...Ch. 27.6 - 1. Inbreeding is sexual reproduction between...Ch. 27.7 - The mutation rate is a. the likelihood that a new...Ch. 27.7 - 2. The transfer of an antibiotic resistance gene...Ch. 27.7 - Prob. 3COMQCh. 27 - 1. What is the gene pool? How is a gene pool...Ch. 27 - Prob. 2CONQCh. 27 - Prob. 3CONQCh. 27 - Prob. 4CONQCh. 27 - The termpolymorphismcan refer to both genes and...Ch. 27 - Prob. 6CONQCh. 27 - For a gene existing in two alleles, what are the...Ch. 27 - 8. In a population, the frequencies of two...Ch. 27 - The ability to roll your tongue is inherited as a...Ch. 27 - What evolutionary factors can cause allele...Ch. 27 - What is the difference between a neutral and an...Ch. 27 - Prob. 12CONQCh. 27 - Prob. 13CONQCh. 27 - Describe the similarities and differences among...Ch. 27 - 15. Is each of the following examples due to...Ch. 27 - Prob. 16CONQCh. 27 - Prob. 17CONQCh. 27 - 18. A group of four birds flies to a new location...Ch. 27 - 19. Describe what happens to allele frequencies as...Ch. 27 - With regard to genetic drift, are the following...Ch. 27 - When two populations frequently intermix due to...Ch. 27 - Two populations of antelope are separated by a...Ch. 27 - Prob. 23CONQCh. 27 - 24. Using the pedigree shown here, answer the...Ch. 27 - A family pedigree is shown here. A. What is the...Ch. 27 - 26. A family pedigree is shown here.
A. What is...Ch. 27 - Prob. 27CONQCh. 27 - Prob. 28CONQCh. 27 - 1. You will need to be familiar with the...Ch. 27 - You will need to refer to question 2 in More...Ch. 27 - Prob. 3EQCh. 27 - Prob. 4EQCh. 27 - You will need to refer to question 2 in More...Ch. 27 - Prob. 6EQCh. 27 - Prob. 7EQCh. 27 - In the Grants study of the medium ground finch, do...Ch. 27 - 9. A recessive lethal allele has achieved a...Ch. 27 - Among a large population of 2 million gray...Ch. 27 - In a donor population, the allele frequencies for...Ch. 27 - Prob. 12EQCh. 27 - Prob. 13EQCh. 27 - Prob. 14EQCh. 27 - 15. What would you expect to be the minimum...Ch. 27 - Discuss examples of positive and negative...Ch. 27 - Discuss the role of mutation in the origin of...Ch. 27 - Prob. 3QSDC
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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
- How does Genetic Drift and Non-random mating fit within the scope of Population Genetics?arrow_forwardWhy is mutation important to evolution if it is the microevolutionary force that generally has the smallest effect on allele frequencies?arrow_forwardWhat is Genetic Drift? and what is its significance?arrow_forward
- How does population size affect genetic drift?arrow_forwardWhy does stabilizing selection decrease geneticdiversity?arrow_forwardNieman-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:_________arrow_forward
- Let’s suppose the mutation rate for converting a B allele into a b allele is 10–4. The current allele frequencies are B = 0.6 and b = 0.4. How long will it take for the allele frequencies to equal each other, assuming that no genetic drift takes place?arrow_forwardHow does sampling error cause genetic drift?arrow_forwardWhat is genetic drift?arrow_forward
- What are considered significant factors in maintaining the surprisinglyhigh levels of genetic variation in natural populations ?arrow_forwardYou are studying two genetic loci that are on the same chromosome. One of the loci is a gene that produces darker feathers in dark environments in birds. The second locus is a gene associated with metabolism. In your research you find that the second locus is not under selection, but the first locus is undergoing positive selection. The positive selection at the first locus is increasing a specific allele at the second locus. This discovery of yours is best described as which of the following? a. Recombinaton b. Linkage equilibrium c. Genetic hitchhiking d. Chromosome inversionarrow_forwardYou are a scientist studying a population of beetles. Beetle color is controlled by two alleles at a single genetic locus. AA beetles are blue, Aa purple, and aa pink. You count 30 blue beetles, 10 purple beetles, and 40 pink beetles. a) What is the frequency of the A allele? [ Select ] b) What is the observed frequency of the Aa genotype? 1 Select ] c) Under Hardy-Weinberg equilibrium, what is the expected frequency of the aa gentoype? [ Select ] d) Is this beetle population evolving? I Select ]arrow_forward
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