Human Heredity: Principles and Issues (MindTap Course List)
11th Edition
ISBN: 9781305251052
Author: Michael Cummings
Publisher: Cengage Learning
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Chapter 19, Problem 20QP
Natural Selection Affects the Frequency of Genetic Disorders
Will a recessive allele that is lethal in the homozygous condition ever be completely removed from a large population by natural selection?
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Natural selection means that the environment favors survival of some genotypes. From where does diversity in genotypes come?
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Chapter 19 Solutions
Human Heredity: Principles and Issues (MindTap Course List)
Ch. 19.8 - Why dont genetic markers on the Y chromosome...Ch. 19.8 - Prob. 2GRCh. 19 - If you suspected that heterozygous carriers of a...Ch. 19 - If allele frequencies in the hemoglobin gene are...Ch. 19 - Prob. 1QPCh. 19 - How Can We Measure Allele Frequencies in...Ch. 19 - How Can We Measure Allele Frequencies in...Ch. 19 - Prob. 4QPCh. 19 - Prob. 5QPCh. 19 - How Can We Measure Allele Frequencies in...
Ch. 19 - How Can We Measure Allele Frequencies in...Ch. 19 - How Can We Measure Allele Frequencies in...Ch. 19 - Using the HardyWeinberg Law in Human Genetics...Ch. 19 - Prob. 10QPCh. 19 - Using the HardyWeinberg Law in Human Genetics In a...Ch. 19 - Prob. 12QPCh. 19 - Measuring Genetic Diversity in Human Populations...Ch. 19 - Measuring Genetic Diversity in Human Populations...Ch. 19 - Prob. 15QPCh. 19 - Measuring Genetic Diversity in Human Populations...Ch. 19 - Prob. 17QPCh. 19 - Prob. 18QPCh. 19 - Measuring Genetic Diversity in Human Populations...Ch. 19 - Natural Selection Affects the Frequency of Genetic...Ch. 19 - Prob. 21QPCh. 19 - Prob. 22QPCh. 19 - The Evolutionary History and Spread of Our Species...Ch. 19 - Prob. 24QPCh. 19 - Genomics and Human Evolution The Denisovan genome...
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- Why does genetic variation make it possbile for changes in populations to occur through natural selection.arrow_forwardIndividuals who are SS homozygotes suffer from a debilitating condition called sickle-cell anemia, which drastically decreases survival. But the S allele has not been eliminated by natural selection. Why?arrow_forwardIs it true that natural selection allows only the better alleles to be passed onto the next generation? Please explain in details. The explaination should either agree or disagree, not be in the middle.arrow_forward
- Explain this apparent paradox: Scientists discuss evolution in terms of genotype fitness (the selective advantage that a particular genotype confers on an individual), yet natural selection acts on an organism’s phenotype.arrow_forwardHarmful alleles persist in some populations, explain how this is possible with natural selection occurring?arrow_forwardRate of evolution by selection is highest for an allele when it is _________ . a. wild type b. recessive c. dominant d. co-dominantarrow_forward
- Evolution is sometimes characterized as “survival of the fittest.” Is this consistent with an evolutionary biologist’s definitions of fitness and natural selection? Is this a good way to think about evolution, or a poor one?arrow_forwardGenetic variation is the product of completely random events, but acting upon this randomness is a very nonrandom process called natural selection. Explain or give an example.arrow_forwardWhich of these statements would be consistent with the changes we see in the frequency of the recessive allele? Natural selection has been favoring those individuals who are heterozygous alleles. Natural selection has been favoring those individuals who are homozygous for the hemoglobin S allele.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_forwardNatural selection makes an adaptive trait more common in a population. After many generations, will all individuals in the population have the same adaptive trait?arrow_forwardDarwin proposed natural selection as a mechanism for evolution. How is it similar to artificial selection? How is it different?For natural selection to work, there must be genetic variation within a population as well as mutations? Why must there be both?arrow_forward
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