How does the fact that all ethnic groups except Africans contain some Neanderthal DNA (1–4 percent of their DNA) support the out-of-Africa hypothesis for the origin of modern humans (Homo sapiens)?
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How does the fact that all ethnic groups except Africans contain some Neanderthal DNA (1–4 percent of their DNA) support the out-of-Africa hypothesis for the origin of modern humans (Homo sapiens)?
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- Working as an Anthropologist in South Africa, you’ve been given four hominin craniums and are asked to develop a new classification system. Using cranium size, the robustness of the cheek bones and brow ridges, and the prognathism of the face, how would you categorize these four skulls into species? Would you categorize all four of them as belonging to the same genus? Two geneses? Three geneses? Four geneses? Do you believe any of them are the same species? Explain how you would categorize these four specimens. Explain what features you used to categorize these specimens.Working as an Anthropologist in South Africa, you’ve been given four hominin craniums and are asked to develop a new classification system. Using cranium size, the robustness of the cheek bones and brow ridges, and the prognathism of the face, how would you categorize these four skulls into species? Would you categorize all four of them as belonging to the same genus? Two geneses? Three geneses? Four geneses? Do you believe any of them are the same species? Explain how you would categorize these four specimens. Explain what features you used to categorize these specimens. This is the image of the 4 different hominin individualsWorking as an Anthropologist in South Africa, you’ve been given four hominin craniums and are asked to develop a new classification system. Using cranium size, the robustness of the cheek bones and brow ridges, and the prognathism of the face, how would you categorize these four skulls into species? Would you categorize all four of them as belonging to the same genus? Two geneses? Three geneses? Four geneses? Do you believe any of them are the same species? Explain how you would categorize these four specimens. Explain what features you used to categorize these specimens. (Use complete sentences. Minimum of 4 sentences.)
- The Out of Africa hypothesis (also called the African Replacement hypothesis) proposes that Homo sapiens arose in Africa and evolved there for several hundred thousand years. Then, some 85,000 years ago, a small band of Homo sapiens migrated out of Africa and populated the remainder of the world. Based on this hypothesis, what predictions would you make about worldwide human variation in mtDNA?The first modern humans evolved in Africa. a) What are two kinds of evidence supporting that conclusion, one based on data from living individuals and one from some other source of data? b) What are some unique anatomic and behavioral traits that are unique to hominid species compared to primates, and to Homo sapiens in particular, compared to other hominid species?Once nuclear DNA sequencing became fast and able to handle sequencing ancient DNA, living humans were found to have some Neanderthal genes. Is this finding clear evidence that some early modern humans did indeed hybridize with Neanderthals? Why?
- We have studied how the six major primate groups evolved, with the most recent group being the hominins.The hominins branched off from main ape group around 7 million years ago.According to our lessons explain your reasoning as to whether there is a missing link,or one single specimen that embodies both ape and hominin traits, that serves as a transition between what is clearly ape and what is clearly hominin?What have you found most interesting about the beginning of hominin evolution and why?When I first studied hominin evolution, they had found "Lucy", an Australopithecus afarensis, and everyone thought her species was an early ancestor of Homo sapien. The picture is much more complicated, with lots of hominins living in close proximity for millions of years...much different than our now singular species. Look at the phylogenetic tree and use it as a guide to briefly describe hominin lines in Africa up to Homo. Do not discuss Homo.Just discuss a sense that you generally can grasp what was going on in Africa with our Genus for 6 or 7 million years!What is both the physical and cultural evidence that Homo sapiens nenaderthalensis is an ancestral hominin to Homo sapiens sapiens (modern humans)?
- Two individuals from the San tribe in Africa are more diverse from one another than two individuals from Europe and Asia. This is possibly because hunter-gatherers in Africa share DNA with a variety of other hominin species while only one Homo species populated other regions of the planet. is this statemnet true or falseWhat do the multiregional and out-of-Africa hypotheses predict about the age of the common ancestor of all humans living today?A number of comparisons of nucleotide sequences among hominidsand rodents indicate that inbreeding may have occurredmore often in hominid than in rodent ancestry. Bakewell et al.(2007. Proc. Nat. Acad. Sci. [USA] 104: 7489-7494) suggest thatan ancient population bottleneck that left approximately 10,000 humans might have caused early humans to have a greaterchance of genetic disease. Why would a population bottleneckinfluence the frequency of genetic disease?