Biology: The Essentials
3rd Edition
ISBN: 9781260140705
Author: Marielle Hoefnagels
Publisher: Mcgraw-hill Higher Education (us)
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Textbook Question
Chapter 13.2, Problem 3MC
How does radiometric dating work?
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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 13 Solutions
Biology: The Essentials
Ch. 13.1 - What is the geologic timescale?Ch. 13.1 - What types of information provide the clues that...Ch. 13.2 - Why is the fossil record useful, even if it doesnt...Ch. 13.2 - Distinguish between relative and absolute dating...Ch. 13.2 - How does radiometric dating work?Ch. 13.3 - Prob. 1MCCh. 13.3 - Prob. 2MCCh. 13.4 - Prob. 1MCCh. 13.4 - Prob. 2MCCh. 13.4 - Prob. 3MC
Ch. 13.5 - How does the study of embryonic development reveal...Ch. 13.5 - Prob. 2MCCh. 13.6 - How does analysis of DNA and proteins support...Ch. 13.6 - Prob. 2MCCh. 13 - Why is the fossil record incomplete? a. Because...Ch. 13 - Prob. 2MCQCh. 13 - Prob. 3MCQCh. 13 - The study of biogeography is most concerned with...Ch. 13 - Octopuses and cuttlefish are mollusks that have a...Ch. 13 - Ground beetles have useless hindwings. In related...Ch. 13 - Scorpions occupy every continent except...Ch. 13 - Prob. 8MCQCh. 13 - Prob. 9MCQCh. 13 - Which of the following would be most useful for...Ch. 13 - Prob. 1WIOCh. 13 - Prob. 2WIOCh. 13 - Why are transitional fossils especially useful for...Ch. 13 - Prob. 4WIOCh. 13 - Index fossils represent organisms that were...Ch. 13 - Prob. 6WIOCh. 13 - Prob. 7WIOCh. 13 - How did the discovery of Wallaces line demonstrate...Ch. 13 - Why is it important for evolutionary biologists to...Ch. 13 - Suppose that plants in the San Francisco Bay area...Ch. 13 - Many species look similar as embryos. What causes...Ch. 13 - Give examples of how the field of evolutionary...Ch. 13 - Prob. 13WIOCh. 13 - Prob. 14WIOCh. 13 - Prob. 15WIOCh. 13 - Prob. 16WIOCh. 13 - Genetic anthropology combines the study of DNA...Ch. 13 - Review Burning Question 13.13, which explains why...Ch. 13 - Review the Survey the Landscape figure in the...Ch. 13 - Write a phrase to connect fossils and biogeography...Ch. 13 - Add the following terms to this concept map:...Ch. 13 - Provide an example of ach line of evidence for...
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