Genetics: A Conceptual Approach 6E w/ SaplingPlus (Six-Month Access)
Genetics: A Conceptual Approach 6E w/ SaplingPlus (Six-Month Access)
6th Edition
ISBN: 9781319125929
Author: Benjamin A. Pierce
Publisher: W. H. Freeman
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Chapter 5.3, Problem 5TPSQ
Summary Introduction

To determine:

Whether the notched ears in mouse are a Y-linked trait or a sex limited trait.

Introduction:

Some of the autosomal traits which appear only in one sex (male or female), are termed as sex limited traits. Genes responsible for these traits are present on autosomes, and not on sex chromosomes.

Summary Introduction

To determine:

The crosses which can be carried out to distinguish between Y-linked trait and a sex limited inheritance.

Introduction:

Sex linked traits are present on sex chromosomes and in inheritance all the progenies produced from affected parents will express the gene or carry the allele responsible for the trait. If the trait is sex limited, all the progenies produced from an affected parent will not necessarily express the trait as the traits are present on autosomes.

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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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