ANT1 Practice final

ANT1 Practice final - Put your name, T.A.'s name, and...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
Put your name, T.A.'s name, and section time (day and hour) on your Scantron UCD2000 form and on this test. Be sure to darken each bubble blackly and erase mistakes completely. Choose the letter next to the single best answer. Please circle the best answer on this examination so that we can cross- check. Good luck!! Part I Select the single best answers from the categories at the end of this essay. There are three phases of evolution expressed in the synthetic theory of evolution. First, genetic variation is produced at three levels. At the level of DNA (1) (Concept) is a chemical change in the DNA molecule which gives rise to variation. At the level of the individual organism, (2) (Concept) during the formation of germ cells gives rise to variation. At the level of population, migration gives rise to variation. Second, there is a reduction of genetic variation by two processes. One process, (3) (Concept) , is the chance (or random) removal of genetic variants due to sampling error from generation to generation. It is especially effective in small populations. The other process (4) (Concept) , eliminates the less fit variants (such as those less successful at avoiding predators or finding food). Third, there is species formation. Species form when there is some barrier to gene flow between populations, which is called (5) (Concept) . Concept a. The shuffling of genes (recombination and crossing over). b. Reproductive isolation. c. Genetic drift. d. Natural selection. e. Mutation. Select the single best answer to the following: 6. The biological concept of race refers to: a. a pure-breeding strain of organisms who are reproductively isolated from other strains. b. a population of organisms characterized by allelic frequency differences from those other populations of the same species. c. a category of classification that is exactly analogous to a species. d. all of the above e. b and c only 7. Polygenic traits: a. are those whose genetic expression is controlled by allelic variation at more than one locus. b. are those such as stature that may have an environmental component to their expression. c. include the blood groups, sickle cell trait, and lactose intolerance. d. all of the above e. a and b only 8. Sickle Cell a. is a genetically inherited trait. b. is selectively neutral. c. is homozygous and sex linked. d. all of the above e. a and b only 9. Differential fertility a. is not important for modern humans because of modern methods of contraception.
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
b. is not important for modern humans because of natural and artificially induced abortions. c. is important for evolution only if there is a genetic basis for the differences in the numbers of children produced. d.
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 6

ANT1 Practice final - Put your name, T.A.'s name, and...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online