Genetics: Analysis and Principles
5th Edition
ISBN: 9780073525341
Author: Robert J. Brooker Professor Dr.
Publisher: McGraw-Hill Education
expand_more
expand_more
format_list_bulleted
Concept explainers
Textbook Question
Chapter 27.5, Problem 1COMQ
For selective breeding to be successful, the starting population must
a. have
b. be very large.
c. be amenable to
d. have very little phenotypic variation.
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solutionStudents have asked these similar questions
Which 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.
All of the following are considered a quantitative trait, EXCEPT?
a.
A trait that has a continuously varying phenotype in the population.
b.
A trait that is influenced by both genetic and environmental factors.
c.
A trait that has multiple genes that contribute to the phenotype.
d.
A trait that is influenced by one gene that follows complete dominance inheritance patterns.
Stabilizing 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.
Chapter 27 Solutions
Genetics: Analysis and Principles
Ch. 27.1 - 1. Which of the following is an example of a...Ch. 27.1 - 2. Saying that a quantitative trait follows a...Ch. 27.2 - The variance is a. a measure of the variation...Ch. 27.2 - 2. Which of the following statistics is used to...Ch. 27.3 - 1. For many quantitative traits, genotypes and...Ch. 27.3 - A QTL is a __________ where one or more genes...Ch. 27.3 - 2. To map QTLs, strains are crossed that differ...Ch. 27.4 - 1. In a population of squirrels in North Carolina,...Ch. 27.4 - Prob. 2COMQCh. 27.4 - 3. One way to estimate narrow-sense heritability...
Ch. 27.5 - 1. For selective breeding to be successful, the...Ch. 27.5 - Prob. 2COMQCh. 27 - Give several examples of quantitative traits.How...Ch. 27 - 2. At the molecular level, explain why...Ch. 27 - 3. What is a normal distribution? Discuss this...Ch. 27 - 4. Explain the difference between a continuous...Ch. 27 - What is a frequency distribution? Explain how such...Ch. 27 - 6. The variance for weight in a particular herd of...Ch. 27 - Two different varieties of potato plants produce...Ch. 27 - 8. If , would you conclude that a positive...Ch. 27 - Prob. 9CONQCh. 27 - When a correlation coefficient is statistically...Ch. 27 - 11. What is polygenic inheritance? Discuss the...Ch. 27 - What is a quantitative trait locus (QTL)? Does a...Ch. 27 - 13. Let’s suppose that weight in a species of...Ch. 27 - Prob. 14CONQCh. 27 - 15. From an agricultural point of view, discuss...Ch. 27 - Many beautiful varieties of roses have been...Ch. 27 - 17. In your own words, explain the meaning of the...Ch. 27 - 18. What is the difference between broad-sense...Ch. 27 - The heritability for egg weight in a group of...Ch. 27 - In a fairly large population of people living in a...Ch. 27 - When artificial selection is practiced over many...Ch. 27 - 22. Discuss whether a natural population of wolves...Ch. 27 - 23. With regard to heterosis, is each of...Ch. 27 - Here are data for height and weight among 10 male...Ch. 27 - 2. The abdomen length (in millimeters) was...Ch. 27 - 3. You conduct an RFLP analysis of head weight in...Ch. 27 - 5. Let’s suppose that two strains of pigs differ...Ch. 27 - Prob. 6EQCh. 27 - In a wild strain of tomato plants, the phenotypic...Ch. 27 - The average thorax length in aDrosophilapopulation...Ch. 27 - 9. In a strain of mice, the average 6-week body...Ch. 27 - Prob. 11EQCh. 27 - 11. A danger in computing heritability values from...Ch. 27 - For each of the following relationships,...Ch. 27 - An animal breeder had a herd of sheep with a mean...Ch. 27 - The trait of blood pressure in humans has a...Ch. 27 - Prob. 10EQCh. 27 - Discuss why heritability is an important...Ch. 27 - From a biological viewpoint, speculate as to why...Ch. 27 - 3. What is heterosis? Discuss whether it is caused...
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.Similar questions
- A cat breeder wishes to develop a breed that does not growl. She starts with a diverse mixture of cats. Generation after generation, she allows only the quietest cats to breed. After 30 years of work, she has a new breed of cat with interesting traits, but on average, the cats still growl at about the same rate as other cat breeds. Which of the following would be a logical explanation for her failure? a. There is no variation for the trait (growling). b. The selection was artificial, not natural, so it did not produce evolutionary change. c. The tendency to growl is not a heritable trait. d. There was no selection (differential reproductive success) related to growling behaviorarrow_forwardYou are examining the gene in your snail population that confers resistance to a parasite. There are multiple alleles at this locus. Identify the characteristics that would result in the greatest increase in allele frequency (not necessarily the greatest allele frequency) in one single generation of the resistant allele. Answer Resistant allele acts… Initial resistant allele frequency… Selection strength is… a. dominantly high weak b. recessively low strong c. dominantly low strong d. recessively high weak a. Answer a. b. Answer b. c. Answer c. d. Answer d.arrow_forwardWhat assumptions underlie the use of adoption studies in genetics? a. Adoptees have no contact with their biological parents after birth.b. The adoptive parents and biological parents are not related.c. The environments of biological and adoptive parents are independent.d. All of the above.arrow_forward
- If two or more different genotypes do not respond to environmentalvariation in the same way, this outcome is due toa. a genotype-environment association.b. a genotype-environment interaction.c. the additive effects of alleles.d. both a and b.arrow_forwardRelative fitness a. refers to the survival rate of one phenotype compared to that of another. b. is the physical condition of an individual’s siblings and cousins. c. refers to the reproductive success of a phenotype. d. None of the choices is correct.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
- A population of birds may have red feathers Show work here: (the dominant phenotype) or orange feathers (the recessive phenotype). Red feathered birds have the genotype RR or Rr. Orange feathered birds have the genotype r. The fequency of the RR genotype is 46. a. What is the frequency of heterozygous birds? b. What is the frequency of the R allele? c. What is the frequency of the r allele?arrow_forwardAn 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_forwardIn 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_forward
- 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 parentsarrow_forwardA type of bird on an island makes nests in both tree roots and in tree branches at various heights from the ground. A ground snake invades the island and eats eggs or chicks from nests in tree roots and low tree branches. Part A: What type of selection is operating on the height at which the bird places its nest? A. Stabilizing B. Balancing C. Directional D. Disruptive What's the rationale? What effect will this selection have on the trait phenotype (height of nest)? Answer based on chart linkedarrow_forwardThe graph below shows values for body size in parents and offspring. The data shown are consistent with which of the following situations. ANSWER CHOICES A. variation in body size is completely due to variation in the environment (heritability is 0) B. most of the variation in body size is due to variation in the environment but there is a small effect of genes (heritability is around 0.2) C. variation in body size is completely due to variation in genes (heritability is 1.0) D. most of the variation in body size is due to variation in genes but there is some effect of the environment (heritability is about 0.8)arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
- Human Anatomy & Physiology (11th Edition)BiologyISBN:9780134580999Author:Elaine N. Marieb, Katja N. HoehnPublisher:PEARSONBiology 2eBiologyISBN:9781947172517Author:Matthew Douglas, Jung Choi, Mary Ann ClarkPublisher:OpenStaxAnatomy & PhysiologyBiologyISBN:9781259398629Author:McKinley, Michael P., O'loughlin, Valerie Dean, Bidle, Theresa StouterPublisher:Mcgraw Hill Education,
- Molecular Biology of the Cell (Sixth Edition)BiologyISBN:9780815344322Author:Bruce Alberts, Alexander D. Johnson, Julian Lewis, David Morgan, Martin Raff, Keith Roberts, Peter WalterPublisher:W. W. Norton & CompanyLaboratory Manual For Human Anatomy & PhysiologyBiologyISBN:9781260159363Author:Martin, Terry R., Prentice-craver, CynthiaPublisher:McGraw-Hill Publishing Co.Inquiry Into Life (16th Edition)BiologyISBN:9781260231700Author:Sylvia S. Mader, Michael WindelspechtPublisher:McGraw Hill Education
Human Anatomy & Physiology (11th Edition)
Biology
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:PEARSON
Biology 2e
Biology
ISBN:9781947172517
Author:Matthew Douglas, Jung Choi, Mary Ann Clark
Publisher:OpenStax
Anatomy & Physiology
Biology
ISBN:9781259398629
Author:McKinley, Michael P., O'loughlin, Valerie Dean, Bidle, Theresa Stouter
Publisher:Mcgraw Hill Education,
Molecular Biology of the Cell (Sixth Edition)
Biology
ISBN:9780815344322
Author:Bruce Alberts, Alexander D. Johnson, Julian Lewis, David Morgan, Martin Raff, Keith Roberts, Peter Walter
Publisher:W. W. Norton & Company
Laboratory Manual For Human Anatomy & Physiology
Biology
ISBN:9781260159363
Author:Martin, Terry R., Prentice-craver, Cynthia
Publisher:McGraw-Hill Publishing Co.
Inquiry Into Life (16th Edition)
Biology
ISBN:9781260231700
Author:Sylvia S. Mader, Michael Windelspecht
Publisher:McGraw Hill Education
GCSE Biology - Adaptations #79; Author: Cognito;https://www.youtube.com/watch?v=tC-u8xcZYSM;License: Standard Youtube License