Genetics: Analysis and Principles
6th Edition
ISBN: 9781259616020
Author: Robert J. Brooker Professor Dr.
Publisher: McGraw-Hill Education
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Chapter 28.4, Problem 1COMQ
A QTL is a __________ where one or more genes affecting a quantitative trait are ________ .
a. site in a cell, located
b. site in a chromosome, located
c. site in a cell, expressed
d. site in a chromosome, expressed
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Students have asked these similar questions
Which of the following does not describe a gene?
A. A gene is the observable characteristics or traits
B. All are correct
C. Agene is a stretch of DNA that produces one or more genetic traits
D. A gene is the basic unit of genetic information for a specific trait
You perform an adoption study and you determine that for the trait observed there is a strong genetic effect.
This is because you observed _______.
A.
similarities between the adoptees and their sibblings
B.
similarities between adoptees and adoptive parents
C.
similarites between adoptees, biological parents, and adoptive parents
D.
similarities between adoptees and biological parents
A farmer only breeds cows that produce a lot of milk. This is because the farmer wants more cows that will produce more milk. In this case, who or what is the controlling agent that determines whether certain traits are passed to future generations?
a
the environment
b
the farmer
c
the milk
d
the cows
Chapter 28 Solutions
Genetics: Analysis and Principles
Ch. 28.1 - 1. Which of the following is an example of a...Ch. 28.1 - 2. Saying that a quantitative trait follows a...Ch. 28.2 - The variance is a. a measure of the variation...Ch. 28.2 - 2. Which of the following statistics is used to...Ch. 28.3 - 1. For many quantitative traits, genotypes and...Ch. 28.4 - A QTL is a __________ where one or more genes...Ch. 28.4 - 2. To map QTLs, strains are crossed that differ...Ch. 28.5 - 1. In a population of squirrels in North Carolina,...Ch. 28.5 - Prob. 2COMQCh. 28.5 - 3. One way to estimate narrow-sense heritability...
Ch. 28.6 - 1. For selective breeding to be successful, the...Ch. 28.6 - Prob. 2COMQCh. 28 - Give several examples of quantitative traits.How...Ch. 28 - 2. At the molecular level, explain why...Ch. 28 - 3. What is a normal distribution? Discuss this...Ch. 28 - 4. Explain the difference between a continuous...Ch. 28 - What is a frequency distribution? Explain how such...Ch. 28 - 6. The variance for weight in a particular herd of...Ch. 28 - Two different varieties of potato plants produce...Ch. 28 - 8. If , would you conclude that a positive...Ch. 28 - Prob. 9CONQCh. 28 - When a correlation coefficient is statistically...Ch. 28 - 11. What is polygenic inheritance? Discuss the...Ch. 28 - What is a quantitative trait locus (QTL)? Does a...Ch. 28 - 13. Let’s suppose that weight in a species of...Ch. 28 - Prob. 14CONQCh. 28 - 15. From an agricultural point of view, discuss...Ch. 28 - Many beautiful varieties of roses have been...Ch. 28 - 17. In your own words, explain the meaning of the...Ch. 28 - 18. What is the difference between broad-sense...Ch. 28 - The heritability for egg weight in a group of...Ch. 28 - In a fairly large population of people living in a...Ch. 28 - When artificial selection is practiced over many...Ch. 28 - 22. Discuss whether a natural population of wolves...Ch. 28 - 23. With regard to heterosis, is each of...Ch. 28 - Here are data for height and weight among 10 male...Ch. 28 - 2. The abdomen length (in millimeters) was...Ch. 28 - 3. You conduct an RFLP analysis of head weight in...Ch. 28 - 5. Let’s suppose that two strains of pigs differ...Ch. 28 - Prob. 6EQCh. 28 - In a wild strain of tomato plants, the phenotypic...Ch. 28 - The average thorax length in aDrosophilapopulation...Ch. 28 - 9. In a strain of mice, the average 6-week body...Ch. 28 - Prob. 10EQCh. 28 - 11. A danger in computing heritability values from...Ch. 28 - For each of the following relationships,...Ch. 28 - An animal breeder had a herd of sheep with a mean...Ch. 28 - The trait of blood pressure in humans has a...Ch. 28 - Discuss why heritability is an important...Ch. 28 - From a biological viewpoint, speculate as to why...Ch. 28 - 3. What is heterosis? Discuss whether it is caused...
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- For many quantitative traits, genotypes and phenotypes tend tooverlap becausea. the trait changes over time.b. the trait is polygenic.c. environmental variation affects the trait.d. both b and c are true.arrow_forwardHow can a polygenic trait be easily identified? a. There ae only two possible phenotypes for the trait. b. The graphing of the possible phenotypes results in a bell curve. c. The presence of the polygenic trait masks the other possible alleles involved. d. The environment has a greater influence on the trait.arrow_forwardStabilizing selection on a trait tends toa. make the trait more extreme.b. reduce variability in the trait.c. decrease the frequency of alleles associated with the trait.d. result in elaborate male ornaments.arrow_forward
- In a population of squirrels in North Carolina, the heritability forbody weight is high. This means thata. body weight is primarily controlled by genes.b. the environment has little influence on body weight.c. the variance in body weight is mostly due to genetic variation.d. both a and b are correct.arrow_forwardIn plants, a trait has a narrow-sense heritability of 0.75. This indicates a) the trait is inherited from a parent 75% of the time. b) the proportion of phenotypic variance due to environmental variance. c) the degree of inbreeding from artificial selection. d) the proportion of variance due to additive alleles.arrow_forwardWhich of the following is the MOST important characteristic of a trait for it to undergo descent with modification? A. It must be heritable. B. It must exhibit variation. C. It must exhibit phenotypic plasticity. D. Variation in the trait must be accompanied by variation in fitness.arrow_forward
- An organism with a wild-type phenotype has a. the most common expression of a gene in a population. b. only the dominant allele for a gene. c. only the recessive allele for a gene. d. an appearance different from others in the population.arrow_forwardWhich of the following is false? a. The color of a fruit fly's eyes is a trait. b. The instructions for producing a trait are found in a gene that controls the physical expression of that trait. c. A gene can have different alleles that can specify different traits, such as red or brown eye color. d. The trait is influenced by the gene, independent of the environment. e. By studying the patterns of traits over generations of an organism, the genetic composition of an organism can be deduced.arrow_forwardWhich of the following statements is true?a. Not all inheritance patterns follow a strict dominant/recessive relationship.b. Geneticists want to understand both inheritance patterns and theunderlying molecular mechanisms that cause them to happen.c. Different inheritance patterns are explained by a variety ofdifferent molecular mechanisms.d. All of the above are true.arrow_forward
- According to the video “The Biology of Skin Color”, why is it that the allele coding for darker skin did not evolve to protect us from skin cancer? A. Because skin cancer isn't harmful B. Darker skin did develop to protect us from skin cancer C. Because skin cancer usually develops after an individual's reproductive years, so it doesn't affect the ability for someone to pass on their genes D. Because skin cancer usually develops before an individual's reproductive years, so it doesn't affect the ability for someone to pass on their genesarrow_forwardPea plants were a good model organism for Mendel because A -they had large flowers and were easy to manipulate b -there were many contrasting traits c -both a and b d- none of the abovearrow_forwardWhen Gregor Mendel first proposed his theories on genetics, they were not recognized. This was because: A. Charles Darwin didn't agree with Gregor Mendel's theories. B. The current theory was that traits from parents blended together in their offspring. C. Gregor Mendel proposed that individuals could change their physical traits during their lifetime and pass those new traits on to their offspring. D. Scientists believed there were 5 nucleotide bases, not 4 nucleotide bases.arrow_forward
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