Gen Combo Ll Biology; Connect W/learnsmart Labs Access Card
4th Edition
ISBN: 9781259853197
Author: Robert Brooker
Publisher: MCGRAW-HILL HIGHER EDUCATION
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Chapter 46, Problem 1COQ
Summary Introduction
To determine: The differences between ectothermic and endothermic organisms and also determine differences between heterothermic and homeothermic organisms.
Introduction: The biologists classified animals on the basis of both the heat source which is used to warm their body surfaces and the particular ability of animals to maintain their body temperature. They can be categorized under ectothermic, endothermic, heterothermic, and homeothermic animals.
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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 46 Solutions
Gen Combo Ll Biology; Connect W/learnsmart Labs Access Card
Ch. 46.2 - Prob. 1CCCh. 46.2 - Prob. 1BCCh. 46.2 - Prob. 2CCCh. 46.3 - Prob. 1CCCh. 46.3 - Can the relationship between body size and...Ch. 46.3 - What observation led to the experiments conducted...Ch. 46.3 - CoreSKILL How did the experimental linking of the...Ch. 46.3 - Prob. 3EQCh. 46.4 - Prob. 1CCCh. 46 - Prob. 1TY
Ch. 46 - Gluconeogenesis a. occurs when the liver...Ch. 46 - Prob. 3TYCh. 46 - Prob. 4TYCh. 46 - Insulin primarily regulates the blood glucose...Ch. 46 - Prob. 6TYCh. 46 - Prob. 7TYCh. 46 - Prob. 8TYCh. 46 - Prob. 9TYCh. 46 - Prob. 10TYCh. 46 - Prob. 1CQCh. 46 - Prob. 2CQCh. 46 - Prob. 3CQCh. 46 - Prob. 1COQCh. 46 - Prob. 2COQ
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