BIOLOGY (OER)
2nd Edition
ISBN: 2810023110482
Author: OpenStax
Publisher: MBS
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Chapter 29, Problem 23CTQ
What are the characteristic features of the chordates?
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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 29 Solutions
BIOLOGY (OER)
Ch. 29 - Figure 29.3 Which of the following statements...Ch. 29 - Figure 29.22 Which of the following statements...Ch. 29 - Figure 29.24 Members of the order Testudines have...Ch. 29 - Which of the following is not contained in phylum...Ch. 29 - Which group of invertebrates is most closely...Ch. 29 - Hagfish. lam preys. sharks, and tuna are all...Ch. 29 - Members of Chondrichthyes differ from members of...Ch. 29 - Members of Chondrichfhyes are thought to be...Ch. 29 - A marine biologist catches a species of fish she...Ch. 29 - Which of the following is not true of...
Ch. 29 - Frogs belong to which order? Anura Urodela Caudata...Ch. 29 - During the Mesozoic period, diapsids diverged...Ch. 29 - Squamata includes. crocodiles and alligators...Ch. 29 - Which of the following reptile groups gave rise to...Ch. 29 - A bird or feathered dinosaur is. Neornithes...Ch. 29 - Which of the following feather types helps to...Ch. 29 - Eccrine glands produce sweat lipids scents milkCh. 29 - Monotremes include: kangaroos koalas bandicoots...Ch. 29 - The evolution of which of the following features...Ch. 29 - Which of the following is not an anthropoid?...Ch. 29 - Which of the following is part of a clade believed...Ch. 29 - Which of the following human traits is not a...Ch. 29 - What are the characteristic features of the...Ch. 29 - What is the structural advantage of the notochord...Ch. 29 - What can be inferred about the evolution of the...Ch. 29 - Why did gnathostomes replace most agnathans?Ch. 29 - Explain why frogs are restricted to a moist...Ch. 29 - Describe the differences between the larval and...Ch. 29 - Describe how metamorphosis changes the structures...Ch. 29 - Describe the functions of the three extraembryonic...Ch. 29 - What characteristics differentiate lizards and...Ch. 29 - Based on how reptiles therm oregulate, which...Ch. 29 - Explain why birds are thought to have evolved from...Ch. 29 - Describe three skeletal adaptations that allow for...Ch. 29 - How would the chest structure differ between...Ch. 29 - Describe three unique features of the mammalian...Ch. 29 - Describe three characteristics of the mammalian...Ch. 29 - How did the evolution of jaw musculature allow...Ch. 29 - How did archaic Homo sapiens differ from...Ch. 29 - Why is it so difficult to determine the sequence...
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