20. A mutation occurs in one of your lung cells. Which of the following is true?
ID: 83252 • Letter: 2
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20. A mutation occurs in one of your lung cells. Which of the 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 of Galapagos finches were each adapted to eating different foods. This is an example of a. Gene flow b Adaptive radiation c. patric speciation d Both a and b are correct e, a, b, and c are all correct 22. 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 a. 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 explanation is: Gene flow g. Stabilizing selection h, Directional selection Genetic drift 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 d. He witnessed an earthquake and the resulting fault e. All of the above DID occur on the voyage.Explanation / Answer
20 . Answer c and d
Explanation: A genetic disorder that affects mostly the lungs is known as Cystic fibrosis (CF). It is caused due to muataion in both the copies of a gene.. Cystic fibrosisis is inherited in an autosomal recessive manner. The symptoms of cystic fibrosis are poor weight gain even having normal food intake, salty-tasting skin and poor growth. At least 97% of men will be sterile and no longer be able to have childrien. The main reason of infertility in men with CF is congenital absence of the vas deferens.
21. Answer e (a, b, and c all correct).
Explanation: Darwin's finches is also called as the Galápagos finches.The closest resemblance of the Galápagos finches is Tiaris obscura. The adaptive radiation is a process occur among organisms when a change in the environment makes new resources available, creates new challenges, or opens new environmental niches. It diversify organism rapidly from an ancestral species into a multitude of new forms. This process results in the speciation that exhibit different morphological and physiological traits.
22. Answer d; genetic drift.
Explanation ; The random alteration in the numbers of alleles in a population is called genetic drift, Numbers of alleles can either increase or decrease by chance over time.
23. Answer h; directional selection
Stabilizing selection leading to a decrease in genetic diversity
Genetic drift can result in the loss of rare alleles.
Directional selection is a mode of natural selection causing the allele frequency to shift over time in the direction of that phenotype.
24. e. All of the above did occur on the voyage.
Explanation: Darwin's Description of the 1835 Concepción Earthquake.
Charles Darwin read, and was much inspired by, Lyell's Principles of Geology.
the sixth edition deal with Malthus's An Essay on the Principle of Population.
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