Sickle-Cell Anemia

question 81

Multiple Choice

Sickle-cell anemia

• A)occurs in individuals who have one allele for normal blood cells and one allele for sickle-shaped cells.
• B)is not an inherited disorder.
• C)is not a serious health problem because it is easily cured.
• D)is becoming less common in successive generations of African Canadians.

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Definitions:

Reaction Range

The concept in genetics that an individual's phenotype (expressed traits) for a trait can vary within a range, depending on environmental conditions.

Identical Twins

Twins who develop from a single fertilized egg that splits, resulting in two genetically identical individuals.

Orphanage

A residential institution dedicated to the care of orphans - children whose parents are deceased or otherwise unable to care for them.

Multiple Intelligences

A theory suggesting that individuals have diverse types of intelligence, rather than a single, general ability.