CAMPBELL BIOLOGY-EBOOK
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ISBN: 9780134443959
Author: Urry
Publisher: PEARSON
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Textbook Question
Chapter 21.5, Problem 4CC
WHAT IF? Ø In 2005, Icelandic scientists reported finding a large chromosomal inversion present in 20% of north- ern Europeans, and they noted that Icelandic women with this inversion had significantly more children than women without it. What would you expect to happen to the frequency of this inversion in the Icelandic population in future generations?
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1.) What happens to the genotypic frequencies from generation 1 to generation 5?
2.) What process is occurring when there is a change in genotypic frequencies over a long period of time?
3.) What would happen if it were more advantageous to be heterozygous (Ff)? Would there still be homozygous fish? Explain.
4.) What happens to the recessive genes over successive generations? Explain.
5.) Why doesn't the recessive gene disappear from the population?
1. What is the expected time to fixation in generations for a new mutation in a diploid population (like humans) with an effective population size of 50? This new mutation is neutral and has no impact on fitness (e.g. synonymous polymorphism). Assuming the mutation isn’t lost immediately, will it reach fixation faster in a population of Ne=500 or Ne=5,000 and why?
1. What would be the probability of an allele going to fixation after one generation of drift in a finite diploid population of size N?
2. What would the probability of an allele being purged from a population after one generation of drift in a finite diploid population of size N?
Chapter 21 Solutions
CAMPBELL BIOLOGY-EBOOK
Ch. 21.1 - Describe the whole-genome shotgun approach.Ch. 21.2 - Prob. 1CCCh. 21.2 - Explain the advantage of the systems biology...Ch. 21.2 - MAKE CONNECTIONS The ENCODE pilot project found...Ch. 21.2 - MAKE CONNECTIONS In Concept 20.2, you learned...Ch. 21.3 - The best estimate is that the human genome...Ch. 21.3 - The Genomes Online Database (GOLD) Website of the...Ch. 21.3 - WHAT IF? What evolutionary processes might...Ch. 21.4 - Discuss the characteristics of mammalian genomes...Ch. 21.4 - VISUAL SKILLS Which of the three mechanisms...
Ch. 21.4 - Contrast the organizations of the rRNA gene family...Ch. 21.4 - MAKE CONNECTIONS Assign each DNA segment at the...Ch. 21.5 - Describe three examples of errors in cellular...Ch. 21.5 - Explain how multiple exons might have arisen in...Ch. 21.5 - What are three ways that transposable elements are...Ch. 21.5 - WHAT IF? In 2005, Icelandic scientists reported...Ch. 21 - How did the Human Genome Project result in more...Ch. 21 - What has been the most significant finding of the...Ch. 21 - Compare genome size, gene number, and gene density...Ch. 21 - Explain how the function of transposable elements...Ch. 21 - How could chromosomal rearrangements lead to the...Ch. 21 - What type of Information can be obtained by...Ch. 21 - Bioinformatics intludes all of the following...Ch. 21 - Homeotic genes (A) encode transcription factors...Ch. 21 - Prob. 3TYUCh. 21 - DRAW IT Below are the amino acid sequences(using...Ch. 21 - EVOLUTION CONNECTION Genes important in the...Ch. 21 - scientific inquiry The scientists mapping the SNPs...Ch. 21 - Prob. 7TYUCh. 21 - SYNTHESIZE YOUR KNOWLEDGE Insects have three...
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- About 7% of men in a population are red-green colour blind due to a sex-linked recessive gene. Assuming random mating in the population with respect to colour blindness.What percentage of men would be colour blind in the next generation?arrow_forward21% of a population is homozygous dominant, 50% is heterozygous and 29% is homozygous recessive. What percentage of the next generation is predicted to be homozygous recessive?arrow_forwardAbout 7% of men in a population are red-green colour blind due to a sex-linked recessive gene. Assuming random mating in the population with respect to colour blindness. What percentage of women would be expected to be colour blind?What percentage of women would be expected to be heterozygous?What percentage of men would be colour blind in the next generation?arrow_forward
- I'm confused about how I would figure out these two questions as I don't really understand the difference or where to start. What would genotypic frequencies be for Wildrose at pt-8 if it were in equilibrium? and How many individuals (to 2 decimal places) of each genotype would there be from Wildrose at pt-8 if it were in equilibrium?arrow_forwardPlease answer fast 1. How would immigration affect allele frequency? Write a protocol for a simulation testing the effects of immigration on a population. Your new phenotype will be garbanzo beans. Write in a low immigration scenario (one individual per generation) and a high immigration scenario (five individuals per generation). 2. Based on the simulations you’ve already done, what is your hypothesis for how the garbanzo bean frequency will change over four generations?arrow_forward1. Besides a mutation for red color, what other mutation occurred in the lizard population? 2. How does color affect the fitness of the lizards? 3. What is your prediction of how the lizard population will look like by generation 50? Explainarrow_forward
- 1. Early hunter-gatherers were interbreeding with colonists who brought agriculture from the Middle East. Did genetic adaptations of agriculturalists, such as the ability to digest milk as an adult, might have undergone genetic recombination with genetic adaptations of hunter-gatherers to potentially create a better adapted population in terms of survival and reproductive success? Why or why not?arrow_forwardThe sd gene causes a lethal disease of infancy in humanswhen homozygous. One in 100,000 newborns die eachyear of this disease. The mutation rate from Sd to sd is2 × 10−4. What must the fitness of the heterozygote be toexplain the observed gene frequency in view of the mutation rate? Assign a relative fitness of 1.0 to Sd /Sd homozygotes. Assume that the population is at equilibriumwith respect to the frequency of sd.arrow_forwardAbout 7% of men in a population are red-green colour blind due to a sex-linked recessive gene. Assuming random mating in the population with respect to colour blindness. a) What percentage of women would be expected to be colour blind? b) What percentage of women would be expected to be heterozygous? c) What percentage of men would be colour blind in the next generation?arrow_forward
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