Genetics: A Conceptual Approach
Genetics: A Conceptual Approach
6th Edition
ISBN: 9781319127121
Author: Pierce
Publisher: MAC HIGHER
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Chapter 6.3, Problem 7TPSQ
Summary Introduction

To determine:

The reason behind the concern of offering presymtomatic genetic testing for HD and other genetic tests to minors.

Introduction:

Huntington disease (HD) is a serious genetic disorder that develops in the middle age with symptoms like impaired speech, involuntary movement, difficulty in speaking and swallowing, and cognitive decline. There is no treatment available for Huntington disease and the people will eventually die as the disease progress. The genetic testing involves the comparison of defective and normal genes and then identifying the alleles responsive for causing diseases.

Summary Introduction

To determine:

The type of presymtomatic genetic testing that can be suitable for minors

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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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