what is the relationship between linkage disequilibrium and recombination in sexually reproducing populations?
Homework Answers
The relationship between linkage disequilibrium and recombination in sexually reproducing populations is that the recombination can break down the random negative linkage disequilibrium that occurs between favored alleles, especially when the individual allele frequencies are low. As the number of loci increases, recombination favored over a wider range of population sizes and initial allele frequencies
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what is the relationship between linkage disequilibrium and
recombination in sexually reproducing populations?
Linkage Disequilibrium Mention one possible reason for why the level of LD in human populations is...
Linkage Disequilibrium Mention one possible reason for why the level of LD in human populations is higher in Europe than in Africa? Mention one possible reason to why the level of LD is higher in dogs than in e.g. humans? Calculate LD between two biallelic loci in a situation where one haplotype is deleterious whereas the other haplotypes occur at equal frequencies. After how many generations have the LD between two loci with a recombination rate of 0.1 declined to...
Create two different populations that are each individually in linkage disequilibrium, but when combined are in...
Create two different populations that are each individually in linkage disequilibrium, but when combined are in linkage equilibrium. Use two loci, each with two alleles. None of the populations are allowed to have any of the chromosome frequencies equal to zero. Demonstrate that each population satisfies these requirements (i.e., show that the two original populations are in LD and the combined population is in LE).
Linkage Disequilibrium a) Mention two processes that may cause LD. b) Why may the extent of...
Linkage Disequilibrium a) Mention two processes that may cause LD. b) Why may the extent of LD vary over a chromosome? c) After how many generations have the LD between two loci with a recombination rate of 0.1 declined to 50% of the starting LD? d) Calculate LD between two biallelic loci (alleles A/a and B/b) in a population that has just been formed by mixing equal number of individuals from two source populations with the following allele frequencies: Population...
What is the relationship between linkage and crossing over? Group of answer choices Linkage produces more...
What is the relationship between linkage and crossing over? Group of answer choices Linkage produces more unique allelic combinations than crossing over. Genes that are linked never have crossing over occur between them. Crossing over increases the likelihood that two genes become linked. Crossing over can disrupt the physical linkage of two genes on a chromosome.
Why must all sexually reproducing organisms have both mitosis and meiosis in their life cycles? In other words, what is...
Why must all sexually reproducing organisms have both mitosis and meiosis in their life cycles? In other words, what is the purpose of meiosis AND what is the purpose of mitosis and how are they different? Without sexual reproduction evolution would be extremely slow. Why ? And what stage and steps in meiosis are so important to the genetic variation within a species?
Question 27 0.85 pts CHOOSE THE BEST ANSWER Roundworms are able to reproduce sexually or asexually....
Question 27 0.85 pts CHOOSE THE BEST ANSWER Roundworms are able to reproduce sexually or asexually. The figure below shows the results of an experiment which compared sexual reproduction in: • roundworm populations that were periodically exposed to bacteria that are allowed to evolve (solid black line) • control populations that were never exposed to bacteria (dotted black line) Which of the following statements is true based on what you know about the evolution of sex and the results of...
Two genes are in strong linkage disequilibrium (LD) in a population, with a value of D...
Two genes are in strong linkage disequilibrium (LD) in a population, with a value of D = 0.16. a. If the two genes are on different chromosomes and the population undergoes random mating for two generations, what will the new values of D be after those two generations? [Show calculations, but no written explanation necessary]. b.Would your answer to part (a) increase, decrease, or stay the same if the genes were on the same chromosome? Briefly explain why
With regards to population genetics, how does linkage disequilibrium work? If different loci are very close...
With regards to population genetics, how does linkage disequilibrium work? If different loci are very close together, alleles might be inherited together more often than expected. What does that mean with regards to frequency of those alleles within a population of perhaps 100 individuals (animals)?
You discover a novel unicellular, sexually reproducing organism. The ‘A’ (or ‘a’) locus is 38 map...
You discover a novel unicellular, sexually reproducing organism. The ‘A’ (or ‘a’) locus is 38 map units away from the ‘B’ (or ‘b’) locus. Suppose that ‘A’ encodes cilia that help the cell to move (and is dominant to ‘a’ which is incapable of moving) and that ‘B’ encodes ability to perform photosynthesis (and is dominant to ‘b’ which is incapable of photosynthesis). The ‘A’ locus is on the same chromosome as the ‘B’ locus. One parent with the genotype...
Evolution: population genetics The following are all equivalent definitions of the coecient of linkage disequilibrium given...
Evolution: population genetics The following are all equivalent definitions of the coecient of linkage disequilibrium given in class: D = gAB - ps = pt - gAb = qs - gaB = gab - qt where p is the frequency of the A allele, q is the frequency of the a allele, s is the frequency of the B allele, and t is the frequency of the b allele. For a given set of allele frequencies (p; q; s; t),...
Question 27 0.85 pts CHOOSE THE BEST ANSWER Roundworms are able to reproduce sexually or asexually. The figure below shows the results of an experiment which compared sexual reproduction in: • roundworm populations that were periodically exposed to bacteria that are allowed to evolve (solid black line) • control populations that were never exposed to bacteria (dotted black line) Which of the following statements is true based on what you know about the evolution of sex and the results of...
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