Essentials of Genetics Plus Mastering Genetics with eText -- Access Card Package (9th Edition) (Klug et al. Genetics Series)
9th Edition
ISBN: 9780134047201
Author: William S. Klug, Michael R. Cummings, Charlotte A. Spencer, Michael A. Palladino
Publisher: PEARSON
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Chapter 21, Problem 17PDQ
Suppose you want to develop a population of Drosophila that would rapidly learn to avoid certain substances the flies could detect by smell. Based on the heritability estimate you obtained in Problem 16, do you think it would be worth doing this by artificial selection? Why or why not?
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Chapter 21 Solutions
Essentials of Genetics Plus Mastering Genetics with eText -- Access Card Package (9th Edition) (Klug et al. Genetics Series)
Ch. 21 -
CASE STUDY | A genetic flip of the coin
On July...Ch. 21 - CASE STUDY|A genetic flip of the coin On July 11,...Ch. 21 -
CASE STUDY|A genetic flip of the coin
On July...Ch. 21 - HOW DO WE KNOW?
1. In this chapter, we focused on...Ch. 21 - Review the Chapter Concepts list on page 422....Ch. 21 -
3. Define the following: (a) polygenic, (b)...Ch. 21 - A dark-red strain and a white strain of wheat are...Ch. 21 - Height in humans depends on the additive action of...Ch. 21 -
6. An inbred strain of plants has a mean height...Ch. 21 - Prob. 7PDQ
Ch. 21 - In the following table, average differences of...Ch. 21 - What kind of heritability estimates (broad sense...Ch. 21 - List as many human traits as you can that are...Ch. 21 - Corn plants from a test plot are measured, and the...Ch. 21 -
12. The following variances were calculated for...Ch. 21 - The mean and variance of plant height of two...Ch. 21 - A hypothetical study investigated the vitamin A...Ch. 21 - In a herd of dairy cows the narrow-sense...Ch. 21 - In an assessment of learning in Drosophila, flies...Ch. 21 - Suppose you want to develop a population of...Ch. 21 -
18. In a population of tomato plants, mean fruit...Ch. 21 - In a population of 100 inbred, genotypically...Ch. 21 - In a cross between a strain of large guinea pigs...Ch. 21 - While most quantitative traits display continuous...
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- Upon further scrutiny of the pine beetles over generations, you discover that they have far more than 11 shades of green—in fact, they seem to have a continuous distribution of shades of green color. You take this population and breed them in two different locations: first in a terrarium in the lab, and then in a tree. In which of these two locations will you get a higher heritability value when you measure the variance of phenotypes in the next generation? a) Higher heritability value in the lab. b) The heritability value will be the same because the beetles are the same. c)Higher heritability value in the tree. d)The answer cannot be determined from the information given.arrow_forwardConsider a locus with two alleles, A and a. If the frequency of AA is 0.30, what is the frequency of A under Hardy-Weinberg?arrow_forwardSuppose you are studying the incidence of low lipoprotein lipase activity among 100 pairs of first cousins. The coefficient of relatedness is 12.5% (1/8) and the heritability is 0.48. In how many of the pairs would you find that both cousins have low lipoprotein lipase activity? Answer is 6, but I need the explanationarrow_forward
- Whether or not a person has cheek dimples is an autosomally inherited character due to variation in a single gene. Having cheek dimples (D) is dominant to not having cheek dimple s (d).In a population of 28,000 Greek children, 3,500 had cheek dimples and the rest did not. Assuming that the population is in Hardy-Weinberg equilibrium, A. what are the frequencies of the two alleles? B. how many of the children do you expect to be heterozygous?arrow_forwardYou discover a new X-linked mutation for antenna shape in Drosophila (fruit flies) which produces long antennae. You call this new allele long (XL2), and discover it is incompletely dominant with the short antennae allele (XL1), meaning that heterozygotes have antennae that are intermediate in length. In your laboratory population, 9% of the males have long antennae. Assuming your population is in Hardy-Weinberg equilibrium, what proportion of females would you expect to have intermediate antennae? Answer choices: 0.50 0.90 0.83 0.0081 0.16arrow_forwardEye color in a species of fruitfly is determined by a single locus with two alleles: E and e. EE individuals have red eyes, Ee have pink eyes, and ee individuals have brown eyes. In a lab population that is in Hardy–Weinberg equilibrium, we count 22 flies with brown eyes out of 123. How many flies can you expect to have red eyes? Round your answer to the closest integer value.arrow_forward
- Assuming there are only two alleles at a given locus, if the frequency of one allele is 0.3, what is the frequency of the other allele?arrow_forwardIn a randomly mating laboratory population of Drosophila, 4 percent of the flies have black bodies (encodedby the autosomal recessive b), and 96 percent havebrown bodies (the wild type, encoded by B). If this population is assumed to be in Hardy–Weinberg equilibrium, what are the allele frequencies of B and b and thegenotypic frequencies of B/B and B/b?arrow_forwardIn a drosophila , the allele for normal wing length is dominant over the allele for short wings. In a population of 1000 individuals, 360 show the recessive phenotype. How many individuals would you expect to be homozygous dominant for the trait.arrow_forward
- How are the standard deviation and variance related to each other? How are they different than just measuring the range? Can plot samples of dandelion cover from two different locations have the same mean but different variance? Explain. Can you answer question 3? Thanks.arrow_forwardThe narrow-sense heritability of wing length in a population of Drosophila melanogaster is 0.8. The narrow-sense heritability of head width in the same population is 0.9. The genetic correlation between wing length and head width is −0.86. If a geneticist selects for increased wing length in these flies, what will happen to head width?arrow_forwardYou perform the experiment you described in the last question. And find that the variance due to genetics is 99 feet. What is the heritability of trunk height?arrow_forward
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