EBK LIFE: THE SCIENCE OF BIOLOGY
11th Edition
ISBN: 8220103935432
Author: Sadava
Publisher: MAC HIGHER
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Chapter 12, Problem 4Q
Summary Introduction
To explain:
The cross-over between chromosomes containing genes DDbb and ddBB during meiosis and representation of chromatids and chromosomes before, during, and after crossing over, with the help of a diagram.
Introduction:
A crossing over occurs between chromosomes during meiosis. The meiosis the part of cell-cycle, during, which the genetic material from both the parents gets exchanged. A synapse is formed at the prophase 1 of the meiosis, which is followed by the cross-over between two chromosomes. During a cross-over a new type of
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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
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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 12 Solutions
EBK LIFE: THE SCIENCE OF BIOLOGY
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