Principles of Human Physiology (6th Edition)
6th Edition
ISBN: 9780134169804
Author: Cindy L. Stanfield
Publisher: PEARSON
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Textbook Question
Chapter 20.3, Problem 1CTQ
Which enzyme breaks down lactose, and where is it located?
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Question #3:
In the KeyGene paper, the authors state that it would be useful if pollen from an apomict would
transmit apomixis-inducing genes to the female in the cross (assuming the pollen is viable). Assuming
there was just one gene conferring gametophytic obligate apomixis, and that the two parents are
inbreds, what would be the consequences of such a cross if:
a) The apomixis was a dominant trait? Indicate the genotypes and phenotypes (apomict or non-
apomict) of the parents, F1 and F2 generations. Remember to include the expected genotypic
and phenotypic ratios (or percentages) in the F1 and F2 generations, and to position the female
first (left side) in the parental cross.
b) The apomixis was a recessive trait? Indicate the genotypes and phenotypes (apomict or non-
apomict) of the parents, F1 and F2 generations. Remember to include the expected genotypic
and phenotypic ratios (or percentages) in the F1 and F2 generations, and to position the female
first (left side) in the…
Question #5:
Assume that two genes are identified that confer gametophytic facultative apomixis in soybean. The
genes show independent assortment. Recessive alleles at both loci are required for the facultative
apomixis. Facultative apomixis is triggered when the temperature at pollination is above 20 degrees C.
At temperatures below 20 degrees C, all reproduction is sexual, independent of genotype.
A facultative apomict male, capable of producing viable pollen, was crossed with a sexually
reproducing female. Assuming the parents are completely inbred, what are the predicted phenotypic
ratios (apomict: non-apomict) for the F1, F2, and DH (F1-derived) generations at each of the following
temperatures*:
a) 15°C?
b) 25°C?
*for full credit, show crosses and genotypes where appropriate. Remember to position the
female first (left side) in the cross.
Type your answer here:
Chapter 20 Solutions
Principles of Human Physiology (6th Edition)
Ch. 20.2 - Prob. 20.1.1QCCh. 20.2 - Prob. 20.1.2QCCh. 20.2 - Prob. 20.1.3QCCh. 20.2 - Prob. 1CTQCh. 20.2 - Prob. 2CTQCh. 20.2 - Prob. 3CTQCh. 20.2 - Prob. 20.2.1QCCh. 20.2 - Prob. 20.2.2QCCh. 20.2 - Prob. 20.2.3QCCh. 20.2 -
Name the three pairs of major salivary glands....
Ch. 20.2 - Prob. 20.3.2QCCh. 20.2 - Prob. 20.3.3QCCh. 20.3 - Which enzyme breaks down lactose, and where is it...Ch. 20.3 - Prob. 2CTQCh. 20.3 - Prob. 3CTQCh. 20.3 - Prob. 20.4.1QCCh. 20.3 - Prob. 20.4.2QCCh. 20.3 -
Are absorbed fats transported directly into the...Ch. 20.3 - What role do bile salts play in the digestion of...Ch. 20.4 - Prob. 20.5.1QCCh. 20.4 - Prob. 20.5.2QCCh. 20.4 - To what do the terms cephalic phase, gastric...Ch. 20.4 - Prob. 20.5.4QCCh. 20.5 - Prob. 20.6.1QCCh. 20.5 - Prob. 20.6.2QCCh. 20.5 - Prob. 20.6.3QCCh. 20.6 - Prob. 20.7.1QCCh. 20.6 - Prob. 20.7.2QCCh. 20.6 - Prob. 20.7.3QCCh. 20.6 - Prob. 1CTQCh. 20.6 - Prob. 2CTQCh. 20.6 - Prob. 3CTQCh. 20 - Prob. 1ECh. 20 -
Blockage Of the flow of bile into the duodenum...Ch. 20 - Which of the following is an accurate statement...Ch. 20 - Prob. 4ECh. 20 - Prob. 5ECh. 20 - Prob. 6ECh. 20 - Prob. 7ECh. 20 - Prob. 8ECh. 20 - Prob. 9ECh. 20 - Prob. 10ECh. 20 - Prob. 11ECh. 20 - Prob. 12ECh. 20 - Prob. 13ECh. 20 - Receptive relaxation is an example of...Ch. 20 -
The (submucosal/myenteric) nerve plexus is...Ch. 20 -
The is the outermost layer of the...Ch. 20 - Prob. 17ECh. 20 - Prob. 18ECh. 20 - Prob. 19ECh. 20 - Prob. 20ECh. 20 - Prob. 21ECh. 20 - Prob. 22ECh. 20 - Prob. 23ECh. 20 - Prob. 24ECh. 20 - Chewing is under voluntary control but is also...Ch. 20 - Prob. 26ECh. 20 - Prob. 27ECh. 20 -
When chyme moves from the stomach to the small...Ch. 20 -
Describe the structural adaptations of the small...Ch. 20 - Prob. 30ECh. 20 - Prob. 31ECh. 20 - Prob. 32ECh. 20 - Prob. 33ECh. 20 - Prob. 34E
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