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Researchers set up an obesity study in which MZ and DZ twins who served in the armed forces were studied at induction into the military and 25 years later. Results indicated that obesity has a strong genetic component. a. What are some of the problems with this study? b. Design a better study to test whether obesity has a genetic component.

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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 5, Problem 19QP
Textbook Problem
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Researchers set up an obesity study in which MZ and DZ twins who served in the armed forces were studied at induction into the military and 25 years later. Results indicated that obesity has a strong genetic component.

  1. a. What are some of the problems with this study?
  2. b. Design a better study to test whether obesity has a genetic component.

a.

Summary Introduction

To determine: The problems related to the study in which MZ(Monozygotic) and DZ (Dizygotic) twins who served in the armed forces were studied at induction into the military and later after 25 years.

Introduction: Monozygotic twins are identical twins, and their genetic material is 100% identical whereas the dizygotic twins are fraternal twins with partial identity between their genetic material. Selection bias is an intentional error that is introduced into a study by selecting a group of individuals or data in such a way that proper randomization of the study is not achieved.

Explanation of Solution

In the given case, MZ and DZ twins who have served in the armed forces were studied at induction into the military and later after 25 years. The results showed that obesity has a strong genetic component.

The problems associated with the study are as follows:

  • The study was conducted by using a biased sample of the study. MZ and DZ twins who had served in the armed forces were the only ones selected for the study...

b.

Summary Introduction

To determine: The design of a better study that can test whether obesity has a genetic component.

Introduction: Obesity is a medical condition which is characterized by abnormal weight gain. It is caused by environmental and genetic factors. The results of the study showed that obesity has a strong genetic component.

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