Genetic Analysis: An Integrated Approach (2nd Edition)
2nd Edition
ISBN: 9780321948908
Author: Mark F. Sanders, John L. Bowman
Publisher: PEARSON
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Chapter 21, Problem 22P
Cattle breeders would like to improve the protein content and butterfat content of milk produced by a herd of cows. Narrow sense heritability values are
a. Determine the selection differential (S) for each trait in this herd.
b. Which trait is likely to be the most responsive to artificial selection applied by the cattle breeders through selection of cows for mating?
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In a herd of dairy cows the narrow-sense heritability for milk protein content is 0.76, and for milk butterfat it is 0.82. The correlation coefficient between milk protein content and butterfat is 0.91. If the farmer selects for cows producing more butterfat in their milk, what will be the most likely effect on milk protein content in the next generation?
Please refer to the table below. If only data on the variances for F1, F2 and BC1 populations were available, how will the broad sense heritability estimate change? Show solutions.
What are the mean, variance, and standard deviationfor each trait in this flock?
Chapter 21 Solutions
Genetic Analysis: An Integrated Approach (2nd Edition)
Ch. 21 - Which of the following traits would you expect to...Ch. 21 - 19.2 For the traits listed in the previous...Ch. 21 - Compare and contrast broad sense heritability and...Ch. 21 - 19.4 In a cross of two pure-breeding lines of...Ch. 21 - 19.5 Describe the difference between continuous...Ch. 21 - Prob. 6PCh. 21 - 19.7 Provide a definition and an example for each...Ch. 21 - 19.10 Three pairs of genes with two alleles each (...Ch. 21 - Prob. 9PCh. 21 - 19.12 Two inbred lines of sunflowers produce...
Ch. 21 - Prob. 11PCh. 21 - 19.14 In Nicotiana, two inbred strains produce...Ch. 21 - 19.15 Suppose the length of maize ears has narrow...Ch. 21 - In a line of cherry tomatoes, the average fruit...Ch. 21 - 19.17 Two purebreeding wheat strains, one...Ch. 21 - Prob. 16PCh. 21 - During a visit with your grandparents, they...Ch. 21 - 19.20 An association of racehorse owners is...Ch. 21 - Prob. 19PCh. 21 - Suppose a polygenic system for producing color in...Ch. 21 - New Zealand lamb breeders measure the following...Ch. 21 - Cattle breeders would like to improve the protein...Ch. 21 - In human gestational development, abnormalities of...Ch. 21 - The children of couples in which one partner has...Ch. 21 - Answer the following in regard to multifactorial...
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- Holstein (Bos taurus) produces a high milk yield with good butterfat and protein content, making it ideal for cheese and butter production. The average butterfat content is around 3.5%, which is lower than some other breeds but compensated by the volume of milk produced. Jersey (Bos taurus) is known for its rich milk, which has a high butterfat content of around 4.8%. This quality makes Jersey milk excellent for butter and cheese production, as the higher fat content enhances flavor and texture. Brahman (Bos indicus) is recognized for producing tender and flavorful beef, which is particularly well suited for hot climates due to its heat tolerance and adaptability. The breed's resilience allows it to thrive in challenging environmental conditions. Angus (Bos taurus) is famous for its premium beef, characterized by excellent marbling, tenderness, and flavor. The marbling contributes to the juiciness and overall quality of the meat, making Angus beef highly sought after in the market.…arrow_forwardWhich of the following best describes the broad-sense heritability of a trait? Variance in the trait that is due to genetic effects (VG) The proportion of phenotype variance that is due to genetic effects (VG/Vp) The proportion of phenotype variance that is due to genetic effects (Vp - VG) The proportion of phenotype variance that is not due to genetic effects (Vp- VE) the degree to which genes influencing a trait are passed from offspring to parents Toarrow_forwardEach graph below depicts reaction norms for three different genotypes reared in different environments. In which case(s) is/are VE> 0 (you can assume that graphs for parents and their offspring would be the same)? Mark all that apply Mean phenotype (a) (c) graph a graph b graph c graph d (b) (d) Environmentarrow_forward
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