Pearson eText Human Physiology: An Integrated Approach -- Instant Access (Pearson+)
8th Edition
ISBN: 9780135212905
Author: Dee Silverthorn
Publisher: PEARSON+
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Chapter 23, Problem 19RQ
Summary Introduction
To design: A graph that shows the effect of plasma parathyroid hormone (PTH) concentration on calcium ion concentration and the other graph that shows the effect of plasma calcium ion concentration on PTH.
Introduction: Parathyroid hormone (PTH) is secreted from parathyroid glands, which are located behind the thyroid gland. The main function of PTH is to regulate calcium levels in the blood.
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Question 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)?
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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.
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(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
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Question 14
The relative fitnesses of three genotypes are WA/A= 1.0, WA/a = 0.7, and Wa/a =
0.3. If the population starts at the allele frequency p = 0.5, what is the value of p
in the next generation? (3 pts)
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Chapter 23 Solutions
Pearson eText Human Physiology: An Integrated Approach -- Instant Access (Pearson+)
Ch. 23.2 - Prob. 1CCCh. 23.2 - Prob. 2CCCh. 23.2 - What do the abbreviations HPA and CBG stand for?...Ch. 23.2 - Prob. 4CCCh. 23.2 - Prob. 5CCCh. 23.2 - Prob. 6CCCh. 23.2 - Would someone with Addisons disease have normal,...Ch. 23.2 - Prob. 8CCCh. 23.3 - A woman who had her thyroid gland removed because...Ch. 23.3 - Prob. 10CC
Ch. 23.4 - Prob. 11CCCh. 23.5 - Prob. 12CCCh. 23.5 - Prob. 13CCCh. 23.6 - Prob. 14CCCh. 23.6 - Prob. 15CCCh. 23.6 - Prob. 16CCCh. 23.6 - Prob. 17CCCh. 23 - Name the zones of the adrenal cortex and the...Ch. 23 - For (a) cortisol, (b) growth hormone, (c)...Ch. 23 - Prob. 3RQCh. 23 - Prob. 4RQCh. 23 - Define each of the following terms and explain its...Ch. 23 - Prob. 6RQCh. 23 - Prob. 7RQCh. 23 - Prob. 8RQCh. 23 - Define, compare, and contrast or relate the terms...Ch. 23 - Prob. 10RQCh. 23 - Prob. 11RQCh. 23 - Osteoclasts make acid (H+) from CO2 and H2O. They...Ch. 23 - Prob. 13RQCh. 23 - One diagnostic test to determine the cause of...Ch. 23 - Prob. 15RQCh. 23 - Prob. 16RQCh. 23 - Prob. 17RQCh. 23 - Prob. 18RQCh. 23 - Prob. 19RQ
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