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Studies have shown that there are significant differences in cancer rates among different ethnic groups. For example, the Japanese have very high rates of colon cancer but very low rates of breast cancer. It has also been demonstrated that when members of low-risk ethnic groups move to high-risk areas, their cancer risks rise to those of the high-risk area. For example, Japanese who live in the United States, where the risk of breast cancer is high, have higher rates of breast cancer than do Japanese who live in Japan. What are some of the possible explanations for this phenomenon? What factors may explain why the Japanese have higher rates of colon cancer than do other ethnic groups?

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Human Heredity: Principles and Iss...

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

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Chapter
Section
BuyFindarrow_forward

Human Heredity: Principles and Iss...

11th Edition
Michael Cummings
Publisher: Cengage Learning
ISBN: 9781305251052
Chapter 12, Problem 27QP
Textbook Problem
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Studies have shown that there are significant differences in cancer rates among different ethnic groups. For example, the Japanese have very high rates of colon cancer but very low rates of breast cancer. It has also been demonstrated that when members of low-risk ethnic groups move to high-risk areas, their cancer risks rise to those of the high-risk area. For example, Japanese who live in the United States, where the risk of breast cancer is high, have higher rates of breast cancer than do Japanese who live in Japan. What are some of the possible explanations for this phenomenon? What factors may explain why the Japanese have higher rates of colon cancer than do other ethnic groups?

Summary Introduction

To explain:  The possible reasons behind the variation in cancer rates among different ethnic groups.

Introduction: Several hereditary and environmental factors play a crucial role in the conversion of normal cells to cancerous cells. Factors associated with increasing the risk of developing cancer are smoking, UV radiations from the sun, and viral infections. The genetic factors include inheritance of genes by the offspring’s that are mutated.

Explanation of Solution

The possible reasons behind the variation in cancer rates among different ethnic groups are as follows:

  • Variation in the gene composition:

    The gene structure is highly affected by the environment in which the person is living. A particular gene is sometimes present in a single population, and it is passed from one generation to the other. This gene may have a high susceptibility for cancer. As a result, a particular type of cancer is common to a particular group of people...

Summary Introduction

To determine:  The factors that explain why the Japanese have higher rates of colon cancer than the other ethnic groups.

Introduction: Colon cancer is defined as the uncontrolled growth of cells of the large intestine specifically colon, which is the end region of the large intestine. Most colon cancer is benign by nature, but in some cases, it can be malignant as well. The cancer property is shown by adenomatous polyps that are noncancerous tumors present in the large intestine.

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