In Certain Areas of the World Where There's a High

question 39

Multiple Choice

In certain areas of the world where there's a high incidence of malaria, there's also a high incidence of sickle-cell anemia. Sickle-cell anemia results from a mutation in the gene that codes for hemoglobin. Malaria is an infectious disease carried by mosquitoes. Both malaria and sickle-cell anemia can be fatal. If an individual is homozygous for normal hemoglobin, they're more prone to malaria. If an individual is homozygous for sickle-cell hemoglobin, they'll develop sickle-cell anemia. However, if an individual is heterozygous and possesses one allele for normal hemoglobin and one allele for sickle-cell hemoglobin, they're less prone to malaria and won't develop sickle-cell disease. What description applies to this example?

• A) Being heterozygous can result in greater fitness for an individual.
• B) Inbreeding depression can result in reduced rates of survival.
• C) Genetic drift can occur in small populations.
• D) Homozygous individuals are often unhealthy.

---

Definitions:

Three-step

Refers to a methodological approach or process that consists of three distinct phases or steps, often used in problem-solving or project management.

Communication

The exchange of information, ideas, or messages between individuals through various means, including speech, writing, or electronic media.

Present

The period of time that is currently occurring, distinguished from the past and the future.

Secure Network

A digital network designed with protective measures to prevent unauthorized access, ensuring the confidentiality, integrity, and availability of data.