Concept explainers
MAKE CONNECTIONS Ø The gene that causes sickle-cell disease is present in a higher percentage of residents of sub-Saharan Africa than among those of African descent living in the United States. Even though this gene causes sickle-cell disease, it also provides some protection from malaria, a serious disease that is widespread in sub-Saharan Africa but absent in the United States. Discuss an evolutionary process that could account for the different percentages of the sickle-cell gene among residents of the two regions. (See Concept 1.2.)
Learn your wayIncludes step-by-step video
Chapter 1 Solutions
Investigating Biology Laboratory Manual (9th Edition)
Additional Science Textbook Solutions
Biology: Life on Earth (11th Edition)
Human Physiology: An Integrated Approach (8th Edition)
Microbiology: An Introduction
Microbiology with Diseases by Body System (5th Edition)
Genetic Analysis: An Integrated Approach (3rd Edition)
Human Biology: Concepts and Current Issues (8th Edition)
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