Hemoglobin S,the Variant Responsible for the Misshapen Red Blood Cells

question 40

Multiple Choice

Hemoglobin S,the variant responsible for the misshapen red blood cells characteristic of the disease sickle-cell anemia,is potentially advantageous to heterozygotes because it confers some level of resistance to the disease _________.

• A)rickets
• B)AIDS
• C)cyanosis
• D)polycythemia
• E)malaria

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Definitions:

Birth Rates

The number of live births per thousand people in a population over a given period of time.

Optimum Population Size

The ideal number of individuals in a species that an environment can support sustainably without degrading natural resources.

Population Growth

The increase in the number of individuals in a population, influenced by factors such as birth rates, death rates, and migration.