Connect with LearnSmart for Hoefnagels: Biology: The Essentials
3rd Edition
ISBN: 9781260140712
Author: MariÂlle Hoefnagels
Publisher: Mcgraw-hill Higher Education (us)
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Chapter 11.3, Problem 2MC
What are the potential medical benefits of stem cells?
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You are studying the effect of directional selection on body height in three
populations (graphs a, b, and c below).
(a) What is the selection differential? Show your calculation. (2 pts)
(b) Which population has the highest narrow sense heritability for height?
Explain your answer. (2 pts)
(c) If you examined the offspring in the next generation in each population,
which population would have the highest mean height? Why? (2 pts)
(a)
Midoffspring height (average height of offspring)
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(c)
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(b)
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Tall
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Tall
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Tall
Midparent height
(average height of
Mean of population = 65 inches
Mean of breading parents = 70 inches
Mean of population = 65 inches
Mean of breading parents = 70 inches
Mean of population = 65 inches
Mean of breading parents = 70 inches
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You are studying a population of 100 flowers that has two alleles at a locus for
flower color, blue (B) and green (G). There are 15 individuals with the BB
genotype, 70 individuals with the BG genotype, and 15 individuals with the GG
genotype.
(a) What are the allele frequencies of B and G in the starting population? Show
your calculations. (2 pts)
(b) Is this population in Hardy-Weinberg equilibrium? Show your calculations. (3
pts)
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In a natural population of outbreeding plants, the variance of the total number
of seeds per plant is 16. From the natural population, 20 plants are taken into
the laboratory and developed into separate true-breeding lines by self-
fertilization-with selection for high, low, or medium number of seeds-for 10
generations. The average variance in the tenth generation in each of the 20 sets
is about equal and averages 5.8 across all the sets. Estimate the broad-sense
heritability for seed number in this population. (4 pts)
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Chapter 11 Solutions
Connect with LearnSmart for Hoefnagels: Biology: The Essentials
Ch. 11.1 - What is DNA technology?Ch. 11.1 - In what fields is DNA technology useful?Ch. 11.2 - What are some uses for transgenic organisms?Ch. 11.2 - What are the steps in producing a transgenic...Ch. 11.2 - How do tagged nucleotides participate in first...Ch. 11.2 - What is the function of 98.5 of the human genome...Ch. 11.2 - How does PCR work, and why is it useful?Ch. 11.2 - How are short tandem repeats used in DNA...Ch. 11.2 - Why do investigators sometimes analyze...Ch. 11.3 - Describe the differences among embryonic, adult,...
Ch. 11.3 - What are the potential medical benefits of stem...Ch. 11.3 - Summarize the steps scientists use to clone an...Ch. 11.3 - Why is the technique used to clone mammals called...Ch. 11.4 - Explain how and why a researcher might use a DNA...Ch. 11.4 - Compare and contrast preimplantation genetic...Ch. 11.4 - Prob. 3MCCh. 11.4 - Describe how CRISPR-Cas9 targets a specific gene...Ch. 11.4 - Prob. 5MCCh. 11 - If a restriction enzyme cuts between G and A...Ch. 11 - Which of the following is not a reason that...Ch. 11 - The function of electrophoresis is to a. break a...Ch. 11 - Why is PCR useful? a. Because it replicates all...Ch. 11 - Suppose an investigator at the scene of a murder...Ch. 11 - What is an induced pluripotent stem cell? a. A...Ch. 11 - Dolly the sheep was the first clone of an adult...Ch. 11 - Prob. 8MCQCh. 11 - Preimplantation genetic diagnosis would be least...Ch. 11 - What is the role of a virus in gene therapy? a. It...Ch. 11 - What techniques might researchers use to produce...Ch. 11 - Transgenic crops often require fewer herbicides...Ch. 11 - Describe why sorting DNA fragments by size is...Ch. 11 - Explain how the ingredients in a PCR reaction tube...Ch. 11 - Prob. 5WIOCh. 11 - Why are entire genomes not used for DNA profiling?Ch. 11 - Prob. 7WIOCh. 11 - Mature neurons in the brain do not replicate. Why...Ch. 11 - Unneeded genes in an adult animal cell are...Ch. 11 - Scientists are interested in cloning an extinct...Ch. 11 - Prob. 11WIOCh. 11 - Prob. 12WIOCh. 11 - Use the Internet to research an application of...Ch. 11 - Prob. 14WIOCh. 11 - Review Burning Question 11.11, which describes the...Ch. 11 - Review the Survey the Landscape figure in the...Ch. 11 - How does PCR related to DNA profiling and...Ch. 11 - Add the terms restriction enzyme, plasmid, virus,...Ch. 11 - How is a patient who receives gene therapy similar...
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- In a natural population of outbreeding plants, the variance of the total number of seeds per plant is 16. From the natural population, 20 plants are taken into the laboratory and developed into separate true-breeding lines by self- fertilization-with selection for high, low, or medium number of seeds-for 10 generations. The average variance in the tenth generation in each of the 20 sets is about equal and averages 5.8 across all the sets. Estimate the broad-sense heritability for seed number in this population. (4 pts) 12pt v Paragraph BI DI T² v ✓ B°arrow_forwardQuestion 1 In a population of Jackalopes (pictured below), horn length will vary between 0.5 and 2 feet, with the mean length somewhere around 1.05 feet. You pick Jackalopes that have horn lengths around 1.75 feet to breed as this appears to be the optimal length for battling other Jackalopes for food. After a round of breeding, you measure the offsprings' mean horn length is 1.67. What is the heritability of horns length (h2)? Is Jackalope horn length a heritable trait? (4 pts)? 12pt v Paragraph BIU A ✓arrow_forwardFrequency of allele A1 Question 2 The graph below shows results of two simulations, both depicting the rise in frequency of beneficial allele in a population of infinite size. The selection coefficient and the starting frequency are the same, but in one simulation the beneficial allele is dominant and in the other it is recessive. Neither allele is fixed by 500 generations. 1.0 1 0.8 0.6 0.4 2 0.2 0 0 100 200 300 400 500 Generation (a) Which simulation shows results for a dominant and which shows results for a recessive allele? How can you tell? (4 pts) (b) Neither of the alleles reaches fixation by 500 generations. If given enough time, will both of these alleles reach fixation in the population? Why or why not? (3 pts) 12pt Paragraph BIU AT2v Varrow_forward
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