15 Answers to Evolution Study Questions W09

15 Answers to Evolution Study Questions W09 - Anwers to...

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Unformatted text preview: Anwers to Evolution Study Questions Some of the following are far from easy. But working them out will help you understand the material well. The first two questions are kind of review from last time, but they are relevant to the current material: 1. If one of your parents has a rare gene for, say, propensity toward getting green moldy teeth, what are the odds that you will get it? a. nil b. 25% c. 50% d. 100% The answer is c. It was explained last time. 2. If one of your siblings has a rare gene for, say, propensity toward getting green moldy teeth, what are the odds that you have it? a. nil b. 25% c. 50% d. 100% The answer is c. It was explained last time. But the relevance in this case is that the genetic similarity of parent and offspring is the same as that of two siblings. 3. Which of the following best serves ones reproductive success? a. raise an orphaned baby brother of your now dead parents b. raise one of your own children c. it doesnt matter The correct answer is a. Because of the answers to 1 and 2. 4. In species where only a few males inseminate most of the females, there are typically _____ males as there are females. a. many more b. many less c. somewhat more d. somewhat less e. as many The correct answer is e. One of the answers to the next question is the reason. 5. In species where only a few males inseminate most of the females, a. there is little use for a large number of males, so genes that favor having males become less common and the proportion of males in the population goes down b. if there are equal numbers of males and females, then the reproductive success of the males who do the inseminating is very high, but the average reproductive success of males and females is the same. c. if there are equal numbers of males and females, then the average reproductive success of males is lower than that of females d. if there are equal numbers of males and females, then the average reproductive success of males is greater than that of females e. if the average reproductive success of males is lower than that of females, genes favoring having males will increase in the population. The correct answer is b. The key here is the AVERAGE reproductive success. Each male has just as many offspring as ALL the females. Therefore the gene that determines male-ness is just as successful as that which determines female-ness and hence is just as common in the gene pool....
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This note was uploaded on 03/29/2011 for the course PSYCH Psych15A taught by Professor A during the Winter '09 term at UCLA.

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15 Answers to Evolution Study Questions W09 - Anwers to...

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