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Analysis of X-Linked Dominant and Recessive Traits The X and Y chromosomes are structurally and genetically distinct. However, they do pair during meiosis at a small region near the tips of their short arms, indicating that the chromosomes are homologous in this region. If a gene lies in this region, will its pattern of transmission be more like that of a sex-linked gene or an autosomal gene? Why?

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Human Heredity: Principles and Iss...

11th Edition
Michael Cummings
Publisher: Cengage Learning
ISBN: 9781305251052

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Section
BuyFindarrow_forward

Human Heredity: Principles and Iss...

11th Edition
Michael Cummings
Publisher: Cengage Learning
ISBN: 9781305251052
Chapter 4, Problem 15QP
Textbook Problem
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Analysis of X-Linked Dominant and Recessive Traits

The X and Y chromosomes are structurally and genetically distinct. However, they do pair during meiosis at a small region near the tips of their short arms, indicating that the chromosomes are homologous in this region. If a gene lies in this region, will its pattern of transmission be more like that of a sex-linked gene or an autosomal gene? Why?

Summary Introduction

To explain: The pattern of transmitting genes would be autosomal or sex-linked if the genes of the X and Y-chromosome lies in the same region during meiosis.

Introduction: The structure and genetic constituents of X and Y-chromosome are different. During meiosis, the pairing of X and Y-chromosome take place near the tip of the short arm. This indicates that the gene for the transmission lines in the same region.

Explanation of Solution

The pattern of the genes transmission, which is associated with X and Y-chromosome, would always be sex-linked. The female has two identical X chromosomes and male have one X and one Y chromosomes...

Summary Introduction

To explain: The reason for the sex-linked pattern of the gene transmission.

Introduction: The structure and genetic constituents of X and Y-chromosome are different. During the meiosis, the pairing of X and Y-chromosome take place near the tip of the short arm. This indicates that gene for the transmission lines in the same region.

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