The HbS Allele That Causes Sickle-Cell Anemia in the Recessive

question 93

Multiple Choice

The HbS allele that causes sickle-cell anemia in the recessive condition is most common in areas that experience a high frequency of

• A) polio.
• B) typhus.
• C) diphtheria.
• D) malaria.
• E) cystic fibrosis.

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Definitions:

Fraternal Twins

Twins that develop from two different eggs fertilized by separate sperm cells, resulting in siblings that are genetically unique.

Epigenetic

Refers to the study of changes in organisms caused by modification of gene expression rather than alteration of the genetic code itself.

Biological Parents

The individuals from whom a person inherits their genetic traits, typically referred to as the mother and father.

Adoptive Parents

are individuals who become the legal parents of a child through the process of adoption.