WHAT IS LIFE ACHIEVE ACCESS ONLY >I<
5th Edition
ISBN: 9781319487317
Author: PHELAN
Publisher: INTER MAC
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Chapter 10, Problem 6SA
Summary Introduction
To analyze:
Whether recessive alleles tend to decrease in a population.
Introduction:
An allele that gives the organism a disadvantage at reproducing, will not be passed on to the future generations.
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The frequency of a recessive allele in a population is 50%. What is the frequency of the dominant allele?
In a population the homozygous dominant individuals made up 70% of the population, while heterozygous ones made up 21%, and recessive made up 9%. What are the frequencies of the A and a alleles?
Does inbreeding affect allele frequencies? Why or why not? How does it affect genotype frequencies? With regard to rare recessive diseases, what are the consequences of inbreeding in human populations?
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WHAT IS LIFE ACHIEVE ACCESS ONLY >I<
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- In a population the homozygous dominant individuals (AA) made up 49% of the population, while heterozygous ones (Aa) made up 42%, and recessive (aa) made up 9%. What are the frequencies of the A and a alleles?arrow_forwardIf 90 out of 200 individuals in a population express the recessive phenotype, what is the frequency of the recessive allele?If 90 out of 200 individuals in a population express the recessive phenotype, what proportion of the population are expected to be heterozygotes?arrow_forwardWhat is the ultimate cause of variation in populations?arrow_forward
- Is it easier for selection to remove a deleterious recessive allele from a randomly mating population or from a highly inbred population? Why?arrow_forwardWhat Causes Allele Frequencies to Change in Real Populations?arrow_forwardThere are 60 dominant homozygotes, 100 heterozygotes, and 25 recessive homozygotes in a population. How many dominant alleles are in the population? How many recessive alleles are in the population? For these alleles, what would be the allele frequencies of both?arrow_forward
- In a population, the dominant phenotype of a certain trait occurs 91% of the time. What is the frequency of the dominant allele?arrow_forwardWhy do recessive lethals persist in a population? Provide an example of a recessive lethal allele.arrow_forwardWhy is genetic variation important to populations?arrow_forward
- Why is genetic drift more significant in small populations? Why does it take longer for genetic drift to cause allele fixation in large populations than in small ones?arrow_forwardYou are studying a single-gene locus with two alleles in a population that is in Hardy–Weinberg equilibrium. Examination of a large sample of individuals from the population reveals there are six times as many heterozygotes as there are homozygote recessive individuals in this population. What is the frequency of the recessive allele? I don't know how to start his calculation with just a ratio of 6:1 I found an answer online that says the frequency of q=0.25 but the calculations (below) don't make sense to me. Please help me. What is the answer and how do I get to it? Hardy-Weinberg equation p2+2pq+q2=1 2pq/q2= 6/1 2p= 6q 2(1-p)= 6q 2-2q=6q q=0.25arrow_forwardYou are studying an autosome trait. There are two alleles, one showing complete dominance over the other. In a population, 84% of the individuals show the dominant phenotype. Assuming that this population is under Hardy-Weinberg equilibrium, which of the following statement is TRUE? 36% of individuals have the homozygous dominant genotype. 40% of the alleles in the population is recessive. 16% of the alleles in the population is recessive. 60% of individuals have the dominant alleles.arrow_forward
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