The Allele for Sickle-Cell Anemia Is Found Primarily in Areas

question 64

Multiple Choice

The allele for sickle-cell anemia is found primarily in areas where there are large populations of mosquitoes bearing:

• A) falciparum malaria
• B) parasitic dysentery
• C) smallpox
• D) yellow fever

---

Definitions:

Quantitative Trait

A measurable phenotype that depends on the cumulative actions of many genes and the environment.

Alleles

Alternative versions of a gene that produce distinguishable phenotypic effects.

Environmental Conditions

Various factors or circumstances in the environment that can affect living organisms, including temperature, humidity, and pollution levels.

Nucleotides

The basic building blocks of DNA and RNA, consisting of a sugar, a phosphate, and a nitrogenous base.