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Ch. 24 - Speciation
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All textbooksFreeman 8th EditionCh. 24 - SpeciationProblem 12

Chapter 23, Problem 12

A revolution in the study of human evolution is under way thanks to the invention of techniques that enable DNA sequencing of not only modern humans, but also ancient humans. Before the application of DNA sequencing to fossils, which species concept was most useful for distinguishing human fossils? What is one disadvantage of this approach?

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Hello, everyone here. We have a question asking us what is the logic for using the concept of morphology and species classification? The morphological species concept is based on the idea that organisms with similar characteristics share the same ancestors and are related but distantly related to other species that do not have the same features. So our answer here is a organisms that share similar morphology is share the same ancestors as those without similar morphology. Ease. Thank you for watching. Bye.
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A revolution in the study of human evolution is under way thanks to the invention of techniques that enable DNA sequencing of not only modern humans, but also ancient humans. Human populations today are not considered separate species under the biological species, morphospecies, and phylogenetic concepts. Explain what kind of evidence supports this statement.

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Textbook Question

A revolution in the study of human evolution is under way thanks to the invention of techniques that enable DNA sequencing of not only modern humans, but also ancient humans. Modern humans (Homo sapiens) and archaic humans called Neanderthals (H. neanderthalensis) shared a common ancestor in Africa but diverged in different geographic areas. When modern humans migrated out of Africa and dispersed around the world starting about 100,000 years ago, they overlapped with Neanderthals in Europe. This scenario is best described as a. species living in sympatry following allopatric speciation b. species living in sympatry following sympatric speciation c. species living in allopatry following allopatric speciation d. species living in allopatry following sympatric speciation

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Textbook Question

Svante Pääbo and colleagues were the first to sequence the Neanderthal genome from fossils and compare the sequences to modern humans. According to the data shown here, did the two species interbreed when they overlapped in Europe? Explain.

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Textbook Question

If you sequenced the DNA of all your classmates, you would probably observe that the percentage of Neanderthal genes in their genomes varies from 0–4%. How would you know whether there is a significant difference in percentage between students with blue eyes and students with brown eyes?

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