The human genome contains more than a million copies of the Alu transposable element. Comparative genomics reveals that the Alu element is found only in the clade of mammals that includes primates, tree shrews,rodents, and rabbits. a. What does the observation that the Alu transposon is limited to this clade reveal about its origin and method of spread among species? b. At many sites in the genome, an Alu element is present in humans but absent in chimpanzees, while at many other sites an Alu element is present in chimpanzees but absent in humans. What are two hypotheses that could explain this situation? For any particular site,how could the hypotheses be distinguished?
The human genome contains more than a million copies of the Alu transposable element. Comparative genomics reveals that the Alu element is found only in the clade of mammals that includes primates, tree shrews,rodents, and rabbits.
a. What does the observation that the Alu transposon is limited to this clade reveal about its origin and method of spread among species?
b. At many sites in the genome, an Alu element is present in humans but absent in chimpanzees, while at many other sites an Alu element is present in chimpanzees but absent in humans. What are two hypotheses that could explain this situation? For any particular site,how could the hypotheses be distinguished?
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