Biology
5th Edition
ISBN: 9781260487947
Author: BROOKER
Publisher: MCG
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Chapter 51.1, Problem 1EQ
CoreSKILL » How did Paland and Lynch test the hypothesis that sexual reproduction reduced the frequency of deleterious mutations in a population?
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1a) In a very large population, if the forward and reverse mutation rates are exactly the same, how would you expect the frequency of an original, non-mutated allele to change in the population over time? Will the population eventually achieve an equilibrium value of the frequency of the non-mutated allele?
b) What if the forward mutation rate is one order of magnitude larger (e. 10X) than the reverse mutation rate? Do you expect the frequency of the original, non-mutated allele to increase, decrease, or stay the same over time?
c) If the population size is considerably smaller, does this change your expectations for changes in the frequency of the original, non-mutated allele over several generations?
Steven Frank and Laurence Hurst argued that a cytoplasmically inherited mutation in humans that has severe effects in males but no effect in females will not be eliminated from a population by natural selection because only females pass on mtDNA (S. A. Frank and L. D. Hurst. 1996. Nature 383:224). Using this argument, explain why males with Leber hereditary optic neuropathy are more severely affected than females.
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Chapter 51 Solutions
Biology
Ch. 51.1 - CoreSKILL How did Paland and Lynch test the...Ch. 51.1 - CoreSKILL Approximately how many times more often...Ch. 51.1 - Prob. 3EQCh. 51.3 - Prob. 1CSCh. 51.4 - Prob. 1CSCh. 51.4 - Prob. 2CSCh. 51.4 - Prob. 1CCCh. 51 - Prob. 1TYCh. 51 - Which is considered an advantage of sexual...Ch. 51 - Prob. 3TY
Ch. 51 - Prob. 4TYCh. 51 - Prob. 5TYCh. 51 - Prob. 6TYCh. 51 - A major function of FSH is to a. stimulate the...Ch. 51 - During the human ovarian cycle, ovulation is...Ch. 51 - Prob. 9TYCh. 51 - Prob. 10TYCh. 51 - Prob. 1CQCh. 51 - Prob. 2CQCh. 51 - Prob. 3CQCh. 51 - Prob. 1COQCh. 51 - Describe the events of the ovarian and uterine...
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- please help solve all of them! a) If the Ho+ allele is at a frequency of 10% in 1,000 newborn males, what is the expected number of males (at birth) with each genotype? b) How many of the males of each genotype (from part a) survive to adulthood? c) Of the males that survive to adulthood (from part b), how many offspring do you expect each genotype to contribute to the next generation? d) What is the expected frequency of the Ho+ allele in the the offspring born in the next generation (from part c). e) What is the expected equilibrium frequency of the two alleles given the fitness values shown in the table above and then what is the marginal fitness of the two alleles at the equilibrium frequency?arrow_forwardI need explanation for the why the answer is correct? And why would the other options wrongarrow_forwardProblem 4) 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; 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
- What is genetic flow? A) Genes changing due to mutation B) Random loss of genes in a small population C) Movement of genes between different populationsarrow_forwardMAKE CONNECTIONS In Concept 20.2, you learnedabout genome-wide association studies. Explain howthese studies use the systems biology approach.arrow_forwardSearch for actual mutations that happened to the E. coli bacteria (prokaryotic cells) and where the mutation happened and in which gene. Is the mutated trait recessive or dominant? lastly describe how harmful, or beneficial those mutations were?arrow_forward
- In the replica plate experiment, it shows that mutations are random. However, certain environmental stresses (such as high temperature, high salt, and low pH) can increase the mutation rate. QUESTIONS: Does increasing the mutation rate increase the probability that a cell will experience an adaptive mutation?arrow_forwardPlease asaparrow_forwardVISUALIZE Use two different colors to depict the unduplicated chromosomes of species C with larger chromosomes (2n = 8) and species D with slightly smaller chromosomes (2n = 10), and of their F1 hybrid. Is the hybrid likely to be fertile?arrow_forward
- Variations in chromosome structure are important for which of the following reason(s)?Question 5 options: A) evolution of new species B) may result in the production of abnormal offspring C) may alter the phenotype of an organism D) all of the answers are correctarrow_forwardQ17arrow_forwardScientists are concerned that bacteria will be resistant to all antibiotics within the next decade. Using your knowledge of genetics, briefly describe one method by which bacterial populations can develop drug resistance. Do NOT use "mutation" as your answer. Be more specific. From what you learned in this chapter, how would the bacteria be able to change or mutate in order to become antibiotic resistant? Explain why the following statement is false: Sexual reproduction is the only mechanism for genetic change. Do NOT use Mutation as your answer. Be more specific: what are other mechanisms by which microbes can change or mutate their DNA?arrow_forward
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