Concepts of Genetics (12th Edition)
12th Edition
ISBN: 9780134604718
Author: William S. Klug, Michael R. Cummings, Charlotte A. Spencer, Michael A. Palladino, Darrell Killian
Publisher: PEARSON
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Chapter 25, Problem 2NST
The following table shows measurements for fiber lengths and fleece weight in a small flock of eight sheep.
- (a) What are the mean, variance, and standard deviation for each trait in this flock?
- (b) What is the covariance of the two traits?
- (c) What is the
correlation coefficient for fiber length and fleece weight? - (d) Do you think greater fleece weight is correlated with an increase in fiber length? Why or why not?
■ This problem provides data for two quantitative traits in a flock of sheep. After making numerous statistical calculations, you are asked in part (d) to determine if the traits are correlated.
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1) The following variances were calculated for two traits in a herd of hogs.
Trait
Vp
VG
VA
Back fat
30.6
12.2
8.44
Body length
52.4
26.4
11.70
Calculate the broad sense heritability (H?) and narrow sense heritability's (h2) for each train in this herd.
Which of the two traits will respond best to the selection by a breeder? Why?
Chapter 25 Solutions
Concepts of Genetics (12th Edition)
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