BIOLOGY >PRINT UPGRADE<
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ISBN: 9780357091586
Author: Solomon
Publisher: CENGAGE L
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Chapter 18, Problem 15TYU
EVOLUTION LINK Although most salamanders have four legs, a few species that live in shallow water lack hind limbs and have extremely tiny forelimbs (see photograph). Develop a hypothesis to explain how limbless salamanders came about according to Darwin’s mechanism of evolution by natural selection. How could you test your hypothesis?
The narrow-striped dwarf siren (Pseudobranchus striatus axanthus) is an aquatic salamander that resembles an eel. It is native to Florida.
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The shape of radishes may be long (SL/SL), oval (SL/SS), or round (SS/SS), and the color of radishes may be red (CR/CR), purple (CR/CW) or white (CW/CW). If a long, red radish plant is crossed with a round, white plant, what will be the appearance of the F1 and F2 generations?
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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
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inbreds, what would be the consequences of such a cross if:
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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
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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
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Chapter 18 Solutions
BIOLOGY >PRINT UPGRADE<
Ch. 18.1 - Prob. 1LOCh. 18.1 - Prob. 1CCh. 18.1 - Prob. 2CCh. 18.2 - Prob. 2LOCh. 18.2 - Prob. 1CCh. 18.2 - Prob. 2CCh. 18.3 - Explain the four premises of evolution by natural...Ch. 18.3 - Compare the modern synthesis with Darwins original...Ch. 18.3 - Prob. 1CCh. 18.3 - Why are only inherited variations important in the...
Ch. 18.3 - What was missing in Darwins explanation of...Ch. 18.4 - Summarize the evidence for evolution obtained from...Ch. 18.4 - Define biogeography and describe how the...Ch. 18.4 - Describe the evidence for evolution derived from...Ch. 18.4 - Briefly explain how molecular biology and...Ch. 18.4 - Prob. 9LOCh. 18.4 - Prob. 1CCh. 18.4 - How can we explain that fossils of Mesosaurus an...Ch. 18.4 - How do homologous and homoplastic features provide...Ch. 18.4 - How does developmental biology provide evidence of...Ch. 18.4 - How do predator preferences drive the evolution of...Ch. 18 - Evolution is based on which of the following...Ch. 18 - Evolution is the accumulation of genetic changes...Ch. 18 - Charles Darwin proposed that evolution could be...Ch. 18 - Which of the following is not part of Darwins...Ch. 18 - The evolution of beak size in the various species...Ch. 18 - The fossil record (a) usually occurs in...Ch. 18 - In _______________ the selecting agent is the...Ch. 18 - Aardvarks, anteaters, and pangolins are only...Ch. 18 - Prob. 9TYUCh. 18 - CONNECT In what way does the modern synthesis...Ch. 18 - CONNECT What types of gene changes are most...Ch. 18 - EVOLUTION LINK The use of model organisms such as...Ch. 18 - EVOLUTION LINK Charles Darwin once said, It is not...Ch. 18 - EVOLUTION LINK Write short paragraphs explaining...Ch. 18 - EVOLUTION LINK Although most salamanders have four...Ch. 18 - INTERPRET DATA Which of the primates in Figure...Ch. 18 - Prob. 17TYU
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