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Skin Color Survey of Native Peoples In 2000, researchers measured the average amount of UV radiation received in more than fifty regions of the world, and correlated it with the average skin reflectance of people native to those regions (reflectance is a way to measure the amount of melanin pigment in skin: Skin with more melanin is darker, so it reflects less light). Some of the results of this study are shown in F1GURE 14.1 . FIGURE 14.1 Average skin reflectance of people native to ten countries correlated with regional incident UV radiation . Skin reflectance measures how much light of 695-nonometer Wavelength is reflected from skin; UVMED is the annual average UV radiation received at Earth’s surface. People native to which country have the lightest skin?

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Biology: The Unity and Diversity o...

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

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Section
BuyFindarrow_forward

Biology: The Unity and Diversity o...

15th Edition
Cecie Starr + 3 others
Publisher: Cengage Learning
ISBN: 9781337408332
Chapter 14, Problem 4DAA
Textbook Problem
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Skin Color Survey of Native Peoples In 2000, researchers measured the average amount of UV radiation received in more than fifty regions of the world, and correlated it with the average skin reflectance of people native to those regions (reflectance is a way to measure the amount of melanin pigment in skin: Skin with more melanin is darker, so it reflects less light). Some of the results of this study are shown in F1GURE 14.1.

Chapter 14, Problem 4DAA, Skin Color Survey of Native Peoples In 2000, researchers measured the average amount of UV radiation

FIGURE 14.1 Average skin reflectance of people native to ten countries correlated with regional incident UV radiation. Skin reflectance measures how much light of 695-nonometer Wavelength is reflected from skin; UVMED is the annual average UV radiation received at Earth’s surface.

People native to which country have the lightest skin?

Summary Introduction

To determine: The country whose native people have the lightest skin.

Concept introduction: Melanosomes in skin synthesize melanin pigment and account for the human skin color. Melanin pigment accounts for dark skin color. More melanin pigment provides protection against UV radiations and reflects less light. The inter-individual variation is seen in skin colors due to differences in cellular distribution of melanosomes and the amount of melanin they form.

Explanation of Solution

Refer Fig. 14.1, “Average skin reflectance of people native to ten countries correlated with regional incident UV radiation”, in the textbook. It shows skin reflectance in people native to ten countries...

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