Genetics: A Conceptual Approach
Genetics: A Conceptual Approach
6th Edition
ISBN: 9781319127121
Author: Pierce
Publisher: MAC HIGHER
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Chapter 14.5, Problem 5TPSQ

a.

Summary Introduction

To propose:

The possible explanation for the observation “The number of miRNA genes found on a chromosome is not correlated with chromosomal length. In other words, longer chromosome does not necessarily have more miRNA”.

b.

Summary Introduction

To purpose:

The explanation for the observation “most species show a strong positive correlation between the number of miRNA genes on a chromosome and the number of non-protein encoding genes on a chromosome. In other words, the chromosome with more non-protein-encoding genes has more miRNA genes”.

c.

Summary Introduction

To determine:

The possible explanation for the observation “Many species display a strong positive correlation between the number of miRNA genes on a chromosome and the number of protein-encoding genes on that chromosome. In other words, the chromosome with more protein-encoding geneshasmore miRNA”.

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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…
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