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Human Heredity: Principles and Iss...

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

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BuyFindarrow_forward

Human Heredity: Principles and Iss...

11th Edition
Michael Cummings
Publisher: Cengage Learning
ISBN: 9781305251052
Chapter 9, Problem 14QP
Textbook Problem
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How many kilobases of the DNA strand below will code for the protein product?

Chapter 9, Problem 14QP, How many kilobases of the DNA strand below will code for the protein product?

Summary Introduction

To determine: The kilobases of the DNA strand that will code for the protein product.

Introduction: In a eukaryotic cell, a DNA strand contains both, coding and non-coding part known as exons and introns respectively. Non-coding part of a chromosome does not code for mRNA. Exon also called coding portion codes for mRNA.

Explanation of Solution

The given gene has:

  • Length of exon and intron = 1.5 Kb + 0.5 Kb + 0.7 Kb + 0.3 Kb 0.8 Kb
  • Length of beginning sequence = 7.5 Kb
  • Length of final sequence = 2.5 Kb
  • Length of exon sequence = 1.5 Kb + 0.7 Kb + 0.8 Kb

Proteincodingpropotion=ExonlengthGenelength

Therefore, the percent of the given gene that will code for the protein product is as follows:

Proteincodingproportion=1.5 Kb + 0

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