ESSENTIAL CELL BIOLOGY (LL)-TEXT
5th Edition
ISBN: 9780393680331
Author: ALBERTS
Publisher: NORTON
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Chapter 5, Problem 12Q
Summary Introduction
To find: The definitions and relationships of the terms to each other.
Concept introduction: Every eukaryotic organism contains DNA, the genetic material in their cellular nucleus. It is a complex structure looking like a ladder twisted around in a right-handed manner. During different stages of cell cycle, the chromosome undergoes many changes in their structure and that would result in the characteristic changes in the behaviour of each cell upon the cycle. Transcriptional activity and inactivity primarily depend on the changes in the respective chromosomal structure.
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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
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 5 Solutions
ESSENTIAL CELL BIOLOGY (LL)-TEXT
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