BuyFindarrow_forward

Human Heredity: Principles and Iss...

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

Solutions

Chapter
Section
BuyFindarrow_forward

Human Heredity: Principles and Iss...

11th Edition
Michael Cummings
Publisher: Cengage Learning
ISBN: 9781305251052
Chapter 4, Problem 25QP
Textbook Problem
3 views

Variations in Phenotype Expression

Define penetrance and expressivity.

Summary Introduction

To explain: The term penetrance and expressivity.

Introduction: There are various mutant alleles that have regular and uniform phenotypes. However, some mutant alleles also have unrelated phenotypes. The variation in the expression of mutant alleles is determined by penetrance and expressivity.

Explanation of Solution

  • Penetrance: The probability of the expression of a trait is called penetrance. It can also be defined as the probability of the expression of disease phenotype, only when the genotype of the disease is present. For example, if the penetrance of the gene is 100%, then the dominant disorders have a mutant phenotype in all the individuals who carry the defected alleles.
  • Expressivity: The degree or rate of the expression of a specific trait is called expressivity...

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 4 Solutions

Human Heredity: Principles and Issues (MindTap Course List)
Show all chapter solutions
add

Additional Science Textbook Solutions

Find more solutions based on key concepts
Show solutions add
What is the difference between a law and a theory?

An Introduction to Physical Science

B vitamins often act as: a. antioxidants. b. blood clotting factors. c. coenzymes. d. none of the above.

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

What is the role of helicase in transcription?

Introduction to General, Organic and Biochemistry

Even a small loss of body weight can improve OA.

Nutrition Through The Life Cycle

How would you expect hypothermia to affect enzyme activity in the body?

Chemistry for Today: General, Organic, and Biochemistry

A 0.500-kg object attached to a spring with a force constant of 8.00 N/m vibrates in simple harmonic motion wit...

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

Would residents of California be expecting rain from this weather system?

Oceanography: An Invitation To Marine Science, Loose-leaf Versin