Which of the Following Statements Regarding Down Syndrome Is False

question 34

Multiple Choice

Which of the following statements regarding Down syndrome is false?

• A) Trisomy 21 is the cause of Down syndrome.
• B) Down syndrome is the most common serious birth defect in the United States.
• C) People with Down syndrome usually have a shorter life span than normal.
• D) Down syndrome is least likely to be seen in the infants of mothers over 40.

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Definitions:

Formal Operational Stage

The stage in Piaget's theory of cognitive development where individuals gain the ability to think abstractly, logically, and systematically.

Telomere

A region of repetitive nucleotide sequences at each end of a chromosome, which protects the end of the chromosome from deterioration or from fusion with neighboring chromosomes.

Chromosome

A long, threadlike structure made of protein and a single molecule of DNA, found in the nucleus of most living cells, carrying genetic information in the form of genes.

Neuron

A nerve cell that is the basic building block of the nervous system, responsible for receiving and transmitting information through electrical and chemical signals.