Which of the Following Is TRUE of Down Syndrome

question 141

Multiple Choice

Which of the following is TRUE of Down syndrome?

• A) It primarily occurs in African-American children.
• B) It occurs when genetic imprinting goes awry.
• C) Its symptoms include retardation of motor and mental abilities.
• D) It is caused by the presence of an extra copy of chromosome Y.

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Definitions:

Chaparral Biome

A biome characterized by dense, spiny shrubs and a Mediterranean climate, with hot, dry summers and mild, wet winters, typically found in California and the Mediterranean region.

Primary Production

The rate at which an ecosystem’s producers capture and store energy.

Temperate Deciduous Forest

Northern Hemisphere biome in which the predominant plants are broadleaf trees that lose their leaves in fall and become dormant during cold winters.

Coniferous Forest

A biome characterized by evergreen trees with needles and cones, such as pines, spruces, and firs.