19. An athlete who trains at high elevation will produce additional red blood ce

Question

19. An athlete who trains at high elevation will produce additional red blood cells in response to the lower concentration of oxygen in the air. Which ofthe following is true? a. Her genes for blood cell production will have mutated. b. She will pass on this trait to her children. c. The human species will have evolved. This has no effect on the gene pool. e. Her children, conceived after training, will have a higher than nonmal number of red blood cells. 20 A mutation occurs in one of your lung cells. Which ofthe following is true? a. you have evolved to be better adapted to your environment b. you will soon die because most mutations are lethal c. you will be sterile and no longer be able to have children d. the human species will have evolved because this mutation will be passed on to your children e. this mutation does not affect the human gene pool because it will not be passed on to offspring 21 The many species ofGalapagos finches were each adapted to eating different foods. This is an example of Gene flow b. Adaptive radiation c. Sympatric speciation d. Both a and b are correct e. a, b, and c are all correct 2. A chance event, such as a hurricane, occurred that caused a population to lose many individuals (they died). As a result the population lost alleles because of mutation b. migration c. Selection genetic drift 23. A human population has a higher-than-usual percentage of individuals with a rare genetic disease. The most likely cxplanation is: Gene flow b. Stabilizing selection c, Directional selection Genetic drift e. All of the preceding 24 Which of the following did NOT occur to Darwin on the voyage of the Beagle? a. He read Lyles Principles of Geology b. He observed living animals and similar fossils c. He read Malthus' Essays on Population He witnessed an earthquake and the resulting fault e. All of the above DID occur on the voyage.

Explanation / Answer

19. At high elevation due to low oxygen concentration, athlete manage to survive by acclimatisation. Various physiological changes occured in her body.

Production of red cells increased due to increased secretion of erythropoietin in response to hypoxia. These changes are physiological. There is no effect on gene pool.

So answer is option d.

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