ANHB2215 Study Guide - Final Guide: Human Migration, Imitative Learning, Gamete

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brownseal935

7 Aug 2018

School

UWA

Department

Anatomy and Human Biology/Anatomy, Physiology and Human Biology

Course

ANHB2215

Professor

Debra Judge

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Document Summary

When moved out of africa there were already existing hominids there, the modern humans displaced and replaced the existing with no mixing. Assimilation and hybridisation theory existing hominids there, and admixture occurred. When moved out of africa there were already between the two. Modern humans evolved at different areas, and there was some gene ow at some time. Closely related to inuit and north east asia, including japan. Multiple migrations: peopling of americas (15 - 20 kya, south/middle, paleo-eskimo dispersal (4. 5 kya, thule dispersal (1 kya, north) Farmer came to h/g or pastoralist group and settled. Occurs when two or more previously isolated populations begin interbreeding. How many females/males contributed to the new hybrid population. Variation under environmental in uence of the phenotype without altering genotype e. g. tanning. How genetically identical cells express their genome differently, leading to different phenotypes. Sum total of the genes carried by micro-organisms commensal to humans. Diversity between sample from same habitat in different subjects.

Related Questions

Read the following passage focusing your attention on the scientific procedures and scientific abilities illustrated in it. Think about what types of experiments (observation, testing or application) are described. Identify the hypothesis, predictions, outcomes of experiments and assumptions that appear in the passage. The standard explanation of how humans originally acquired AIDS is that HIV (human immunodeficiency virus) originally was transmitted to humans from monkeys or apes carrying SIV, simian immunodeficiency virus. How could the transmission have occurred? Several similar hypotheses involve an African hunter coming in contact with monkey blood. For example this could have occurred when a hunter butchering a monkey, got some of its blood in a cut, or when a human ate undercooked monkey meat, or when a monkey bit a human. Depending on one's assessment of the genetic diversity of HIV over time, this transmission might have occurred only a few decades ago or, alternatively, hundreds or thousands of years ago. If the latter is correct then AIDS could have been restricted to remote African villages until recent decades when trade and international travel led to the current pandemic. There are however other alternative explanations for the spread of AIDS. One of them is that AIDS arose from contaminated polio vaccines used in Africa from 1957-59. Why is this a plausible explanation? Polio vaccines are cultured on apesâ kidneys, so contamination of a batch of vaccine by an SIV is a possibility. There is a precedent: in the 1950s and early 1960s millions of doses of polio vaccine were contaminated by another simian virus, SV-40. The vaccine alleged to be the origin of AIDS was given to hundreds of thousands of people in central and west Africa from 1957-1959. These locations later had some of the world's highest levels of HIV infection. The timing is also right, since the earliest known cases of AIDS date from the 1960s; the earliest HIV-positive blood sample was collected in Kinshasa in 1959. At the time, there was no way of testing for the presence of SIVs, which were only discovered in the 1980s. Another factor adds plausibility to the theory: the vaccine was given to many infants less than a month old, in an extra high dose. Since the immune systems of infants are not fully developed, this is an excellent way to help a virus jump the species barrier. Some scientists argue that the above explanation is not necessarily correct but that it is worth taking seriously. There are a number of ways to test it. One is to analyze stocks of polio vaccine; if the explanation is correct, then it is probable that some of the vaccines will carry SIV. Another is to scrutinize records of early polio vaccination campaigns in Africa. If it is true that the immunodeficiency virus passed to humans by way of those vaccines, the areas where the campaigns took place would be the same as those where the initial sprouts of the disease occurred and where the larger number of cases occurred during the early stages of the pandemic. Another is to analyze blood samples in Africa from the 1950s and earlier (pre polio vaccination): if the immunodeficiency virus was transmitted via the polio vaccine, HIV should not be found. Adapted from âPolitical refutation of a scientific theory: the case of polio vaccines and the origin of AIDSâ. Brian Martin, published in Health Care Analysis, Vol. 6, 1998, pp. 175-179. Now reread the passage and answer the following questions.

5. For each experiment, write an outcome that would disprove the hypothesis of AIDS passing from monkeys to humans through polio vaccines.

6. What outcomes of the experiments would fail to disprove the hypothesis of AIDS passing from monkeys to humans through polio vaccines?explain.

7.What outcomes would prove the hypothesis? Hint: This is not the same as question 6. Think about what would you need to do to 100% prove a hypothesis.

8. For what reasons do scientists need to conduct testing experiments?

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ANHB2215 Study Guide - Final Guide: Human Migration, Imitative Learning, Gamete

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