EBK LIFE: THE SCIENCE OF BIOLOGY
11th Edition
ISBN: 8220103935432
Author: Sadava
Publisher: MAC HIGHER
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Chapter 55.4, Problem 2R
Summary Introduction
To review:
The part of the rocky intertidal shores where Semi-balanus might have the chance to be benefited from the positive interactions with the other species. Also, to review, if the same condition is possible for Chthamalus.
Introduction:
The two species of barnacles, the Semibalanus and the Chthamalus, have to compete for space on the rocky shorelines. The larvae settle in the intertidal zones were Chthamalus, which have the ability to survive at higher levels settle at heights and semi-balnus settle at lower levels as it has a low tolerance to desiccation.
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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…
Chapter 55 Solutions
EBK LIFE: THE SCIENCE OF BIOLOGY
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