Pearson eText Genetic Analysis: An Integrated Approach -- Instant Access (Pearson+)
3rd Edition
ISBN: 9780135564172
Author: Mark Sanders, John Bowman
Publisher: PEARSON+
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Chapter 19, Problem 13P
What is quantitative trait locus (QTL)? Suppose you wanted to search for QTLs influencing fruit size in tomatoes. Describe the general structure of a QTL experiment, including the kind of tomato strains you would use, how molecular markers should be distributed in the genome, how the genetic marker alleles should differ between the two strains, and how you would use the
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To locate genes associated with quantitative traits, geneticists often use QTL mapping (see the introduction to this chapter). To carry out QTL mapping, a first step is crossing two strains that differ in a quantitative trait, such as a strain of corn with high oil content and a strain with low oil content. The F1 progeny of this cross are then interbred or backcrossed to produce an F2 generation. Researchers then look for statistical associations between genetic markers and the value of the quantitative trait (e.g., oil content) in the F2 generation. Why do the geneticists look for statistical associations in the F2 plants? Why not use the F1 progeny?
What is a quantitative trait locus (QTL)? Does a QTL contain onegene or multiple genes? What technique is commonly used to identify QTLs?
Please solve this problem using the test cross branch diagram without a punnet square.
Chapter 19 Solutions
Pearson eText Genetic Analysis: An Integrated Approach -- Instant Access (Pearson+)
Ch. 19 - Which of the following traits would you expect to...Ch. 19 - 19.2 For the traits listed in the previous...Ch. 19 - Compare and contrast broad sense heritability and...Ch. 19 - 19.4 In a cross of two pure-breeding lines of...Ch. 19 - 19.5 Describe the difference between continuous...Ch. 19 - Prob. 6PCh. 19 - 19.7 Provide a definition and an example for each...Ch. 19 - 19.8 What is a random sample, and why can a random...Ch. 19 - 19.9 Why is heritability an important phenomenon...Ch. 19 - 19.10 Three pairs of genes with two alleles each (...
Ch. 19 - 19.11 In selective breeding experiments, it is...Ch. 19 - 19.12 Two inbred lines of sunflowers produce...Ch. 19 - What is quantitative trait locus (QTL)? Suppose...Ch. 19 - 19.14 In Nicotiana, two inbred strains produce...Ch. 19 - 19.15 Suppose the length of maize ears has narrow...Ch. 19 - In a line of cherry tomatoes, the average fruit...Ch. 19 - 19.17 Two purebreeding wheat strains, one...Ch. 19 - Prob. 18PCh. 19 - During a visit with your grandparents, they...Ch. 19 - 19.20 An association of racehorse owners is...Ch. 19 - Prob. 21PCh. 19 - Suppose a polygenic system for producing color in...Ch. 19 - New Zealand lamb breeders measure the following...Ch. 19 - Cattle breeders would like to improve the protein...Ch. 19 - In human gestational development, abnormalities of...Ch. 19 - The children of couples in which one partner has...Ch. 19 - Answer the following in regard to multifactorial...Ch. 19 - 19.28 Suppose the mature height of a plant is a...Ch. 19 - A three-gene system of additive genes (A, B, and...Ch. 19 - 19.30 Congenital dislocation of the hip is a...Ch. 19 - A total of 20 men and 20 women volunteer to...
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- Regarding the analysis of single marker STR results used in forensic science. Tick all the correct statements: if a suspect's alleles are identical to those collected at a crime scene, then the suspect is possibly guilty dizygotic twins can have similar alleles at an STR locus no correct statement if a suspect's alleles are different from those found at a crime scene, then the suspect is definitely innocent monozygotic twins may have different alleles at an STR locus ☐if a suspect's alleles are different from those collected at a crime scene, then the suspect is possibly innocent ☐two unrelated individuals could have a similar genetic profile monozygotic twins cannot have different alleles at an STR locus dizygotic twins cannot have similar alleles at an STR locus ☐if a suspect's alleles are identical to those collected at a crime scene, then the suspect is definitely guiltyarrow_forwardWe are interested in detremining the genetic map of three different house finch traits: beak color (dark vs light), song length (short vs long) and patch size (reduced vs normal). We have done a large experiment involving the usual PO crossed, with the F1 test crossed. The following are the data for the offspring from the test cross: Beak Shade Patch Size Song Length Number Observed Dark Normal Long 67 Light Normal Long 3 Light Normal Short 498 Dark Normal Short 43 Dark Reduced Short 13 Light Reduced Short 80 Light Reduced Long 50 Dark Reduced Long 389 Choose the map below that best fits the data Beak Shade- 14.26CM- Patch Size- 9.54CM-Song Length O Patch Size-9.54cM- Beak Shade- 14.26CM-Song Length O Patch Size- 14.26cM- Beak Shade- 9.54CM-Song Length O Beak Shade-9.54cM-Patch Size- 14.26CM-Song Length O Patch Size-9.54CM- Song Length- 14.26CM-Beak Shade O Patch Size- 14.26cM-Song Length- 9.54cM-Beak Shadearrow_forwardA) For the 3-point test cross, draw a sample gene map. B) Give the map distances (include units). C) Calculate Interference (I) and COC. Show all work Fly trait body texture, antenna shape, eye color gaunt, normal, white gaunt, feathery, white gaunt, feathery, red shrunken, feathery, white shrunken, normal, white shrunken, feathery, red gaunt, normal, red shrunken, normal, red Total number of progeny: Gamete from trihybrid GNr Gnr GnR gnr gNr gnR GNR gNR Number 628 2708 113 3 124 661 2 2761 7000arrow_forward
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