WHAT IS LIFE? ACHIEVE 1 TERM ACCESS CODE
WHAT IS LIFE? ACHIEVE 1 TERM ACCESS CODE
5th Edition
ISBN: 9781319516116
Author: PHELAN
Publisher: MAC HIGHER
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Chapter 8, Problem 10SA
Summary Introduction

To analyze:

Why a healthy individual can survive with only one X chromosome but not with only one Y chromosome.

Introduction:

The X and Y chromosomes vary in the genes they carry.

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Why is an X chromosome needed for survival?
The X chromosome has a lot of traits for things besides the traits we consider female. It carries traits forthings like the ability of your blood to clot correctly and the ability to see differences in the colors red andgreen. If you blood doesn’t clot correctly, it’s called Hemophilia. If you can’t see the difference betweenred and green, you are colorblind. Therefore, these are referred to as X-Linked or Sex-Linked Traits.Notice that those are on the X chromosome only. That means they are missing from the Y. In fact, the Y iscalled Y because it is physically missing a section at the end. This means the Y chromosome is missing genes that the X chromosome has. If you are XY, you only haveone copy of the gene, or one allele. Given what we just said above, can a XY parent pass a X-Linked Trait to his XY offspring?
If you are a male, your X chromosome has most likely been derived from: your maternal grandfather only your paternal or maternal grandfathers your maternal grandfather or grandmother your paternal grandfather only
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Mitochondrial mutations; Author: Useful Genetics;https://www.youtube.com/watch?v=GvgXe-3RJeU;License: CC-BY