Biology: The Unity and Diversity o...

15th Edition
Cecie Starr + 3 others
Publisher: Cengage Learning
ISBN: 9781337408332



Biology: The Unity and Diversity o...

15th Edition
Cecie Starr + 3 others
Publisher: Cengage Learning
ISBN: 9781337408332
Chapter 13, Problem 9SQ
Textbook Problem

The probability of a crossover occurring between two genes on the same chromosome ________.

  1. a. is unrelated to the distance between them
  2. b. decreases with increasing distance between them
  3. c. Increases with the distance between them

Summary Introduction

Concept introduction: Crossing over occurs between the homologous chromosomes during which the genes are exchanged. Crossing over occurs during the meiosis I. Crossing over helps to eliminate lethal alleles or occurrence of the homozygous recessive alleles that cause disorders. Chiasma is the point of physical contact that occurs between two homologous chromosomes during the crossing over.

Explanation of Solution

Reason for the correct answer:

For genes to undergo the cross over the thumb rule is that there must be enough distance between their loci, then the genes can be exchanged between the homologous chromosomes. Adjacent genes cannot undergo the cross over as the chiasma cannot form between the adjacent genes of the homologous chromosome. If two genes are far off, the chiasma can form between them and thus cross over can take place. If genes have a large distance between them the chiasma formation is easy to occur.

Option c. is given as “increases with the distance between them” and since a minimum distance is required between the genes for chiasma to form and greater the distance and the easier it is to form the chiasma, the correct answer is option c...

Still sussing out bartleby?

Check out a sample textbook solution.

See a sample solution

The Solution to Your Study Problems

Bartleby provides explanations to thousands of textbook problems written by our experts, many with advanced degrees!

Get Started

Chapter 13 Solutions

Biology: The Unity and Diversity of Life (MindTap Course List)
Show all chapter solutions

Additional Science Textbook Solutions

Find more solutions based on key concepts
Show solutions add
Methylmercuryis a toxic industrial pollutant that is easily destroyed by cooking. T F

Nutrition: Concepts and Controversies - Standalone book (MindTap Course List)

What is the structure and function of a chloroplast?

Biology: The Dynamic Science (MindTap Course List)

In what way has biotechnology had an impact on agriculture in the United States?

Human Heredity: Principles and Issues (MindTap Course List)

Problem 24-1 What is the functional difference between G-protein and GTP?

Introduction to General, Organic and Biochemistry

How can you explain the Algol paradox?

Horizons: Exploring the Universe (MindTap Course List)

After a ball rolls off the edge of a horizontal table at time t = 0, its velocity as a function of time is give...

Physics for Scientists and Engineers, Technology Update (No access codes included)