Concepts of Genetics (11th Edition)
11th Edition
ISBN: 9780321948915
Author: William S. Klug, Michael R. Cummings, Charlotte A. Spencer, Michael A. Palladino
Publisher: PEARSON
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Chapter 23, Problem 12PDQ
The following variances were calculated for two traits in a herd of hogs.
- (a) Calculate broad-sense (H2) and narrow-sense (h2) heritabilities for each trait in this herd.
- (b) Which of the two traits will respond best to selection by a breeder? Why?
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What is the difference between broad-sense heritability and narrow-sense heritability? Why is narrow-sense heritability such auseful concept in the field of agricultural genetics?
The locus in a species of wild apples affects the redness of the fruit. There are two alleles, V1 and V2. V2V2 individuals have a redness index of 10 on average, V1V2 individuals have a redness index of 12 on average, and V1V1 individuals have a redness index of 18 on average.
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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.
Chapter 23 Solutions
Concepts of Genetics (11th Edition)
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