Module 7 Lecture Quiz- Speciation and N...SC2005- Biological Sciences, Fall 2017.pdf

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Unformatted text preview: Module 7 Lecture Quiz: Specia on and Non‐Adap ve Evolu on Due Oct 6 at 11:59pm Points 25 Questions 25 Available Sep 23 at 2am ­ Oct 13 at 11:59pm 21 days Time Limit 40 Minutes Instruc ons You will have 40 minutes to complete this quiz. You may use your worksheets and notes form this Module's lectures, readings and activities. This quiz was locked Oct 13 at 11:59pm. A empt History LATEST Attempt Time Score Attempt 1 19 minutes 24 out of 25 Score for this quiz: 24 out of 25 Submitted Oct 6 at 4:39pm This attempt took 19 minutes. Question 1 If you know that p = .7, what is q? .7 Correct! .3 .49 .09 1 / 1 pts Question 2 1 / 1 pts Non­adaptive evolution would NOT include which of the following? genetic drift Correct! natural selection founder effect genetic bottlenecks Question 3 0 / 1 pts Speciation is guaranteed to take place if enough time has passed. You Answered orrect Answer True False Question 4 1 / 1 pts Which of the following hypothetical populations has evolved? Population A's allele frequencies have changed from one generation to the next. Population B started with 80% blue and 20% purple individuals and the next generation had 75% blue and 25% purple. Population C originally had 100 members. 50 were spotted, 40 were striped, and 10 were solid colored. 40 of the spotted, 30 of the striped, and all of the solid colored taxa were washed away and died in a flood. Now there are only striped and solid colored offspring in the next generation. Correct! Evolution has taken place in all of these populations. Evolution has not taken place in any of these populations. Question 5 1 / 1 pts If p = .3, what is the frequency of homozygous dominant individuals? .3 .7 Correct! .09 (2)(.09)(.07) Question 6 Which of the following are possible results of genetic drift? 1 / 1 pts An iguana rides a tree to a remote island. She is pregnant, and her offspring rapidly colonize the island. Unlike the mainland population, which are green, brown and red, the island specimens are all green and red. A bounty on wolf pelts has reduced the population of wolves on a certain mountain range to only about 1/10 of its original size. The bounty is lifted and the wolves regain their original population size, but not their alleleic diversity. A pair of wild horses are trapped in a canyon by a rock­slide. They survive and reproduce for generations, but when they are finally able to get out of the canyon, they all have brown coats and one blue eye like their great­great­ great­great­great grandfather. A population of fish are trapped in a lake when the glaciers recede. They have all the original allelic diversity of the larger population in the 1st generation (10 are blue, 10 are red, 10 are green and 10 are gray), but by the 4th generation all the red fish are gone even though there was no selection against red. Correct! all of the above could be caused by drift. A,B and C all experienced selection. Question 7 1 / 1 pts Which of the following will increase genetic diversity, but is relatively slow? migration Correct! mutation selection drift Question 8 1 / 1 pts Which of the following is NOT a reason why genetic variation matters? provides raw material for natural selection to act on if the population is faced with a change in selective pressures, at least SOME of the variants might be able to survive Correct! so that all the members of the population can interbreed so that the population doesn't all die from a single virus Question 9 1 / 1 pts Which of the following is an example of post­zygotic isolation? Correct! The sperm of a goat can fertilize the egg of a sheep, but the embryo fails to develop The offspring of a coyote and a gray wolf produce red wolves that can themselves produce fertile offspring. Darwin's finches adapted to their local environments on different islands. none of the above Question 10 1 / 1 pts Genetic drift is faster in larger populations. True Correct! False Question 11 1 / 1 pts Hardy­Weinberg is useful in scientific studies of evolution because it: gives good practice in math allows you to calculate allele frequencies if you have p and q Correct! provides a null hypothesis to test against provides an alternate hypothesis to test for Question 12 What is the effect of genetic drift on genetic diversity? increases genetic diversity Correct! decreases genetic diversity no effect on genetic diversity 1 / 1 pts Question 13 1 / 1 pts Evolution can only take place by the forces of natural selection. True Correct! False Question 14 1 / 1 pts Darwin's finches are an example of which of the following? allopatric speciation pre­zygotic isolation founder effects adaptation Correct! all of the above Question 15 1 / 1 pts What is the utility of the Hardy­Weinberg equation? you can test to see if a population is evolving you can monitor the health of the population in terms of genetic diversity you can test to see if allele frequencies are changing Correct! all of the above are uses of Hardy­Weinberg Question 16 1 / 1 pts In the Hardy­Weinberg equation, what do p and q represent? Correct! frequency of 2 alleles in a population frequency of 2 genes in a population whether or not the population evolves homozygous genotypes Question 17 1 / 1 pts Hardy­Weinberg is representative of how allele frequencies might behave in the "real" world. True Correct! False Question 18 Genetic drift only happens in small populations. 1 / 1 pts True Correct! False Question 19 1 / 1 pts A small population might still exhibit high genetic diversity if which of the following applies? Correct! gene flow lots of offspring strong natural selection none of these will help Question 20 1 / 1 pts When a population is unable to interbreed with other members of its (former) group, it is said to be ____________________. At this point, it is considered a ___________________. suffering from inbreeding depression; population suffering from inbreeding depression; new species reproductively isolated; population Correct! reproductively isolated; new species Question 21 1 / 1 pts Speciation ALWAYS requires a physical barrier. True Correct! False Question 22 1 / 1 pts Which of the following is NOT an assumption of Hardy­Weinberg? no mutation no migration no selection no drift random mating Correct! all of the above are assumptions of Hardy­Weinberg Question 23 The red wolf "problem" is an issue for which reasons? Correct! it is not clear if they are a species or not they are reproductively isolated 1 / 1 pts they attack farmer's livestock they are teetering on the brink of extinction Question 24 1 / 1 pts If p = .9, what is the frequency of the heterozygote? .81+(2)(.9)(.1) + (.01) .10 .81 + .18 Correct! .18 Question 25 1 / 1 pts Which of the following is NOT a random process? mutation genetic drift Correct! natural selection all of these are random Quiz Score: 24 out of 25 ...
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