The Most Frequently Stated Cause for Down Syndrome Is

question 18

Multiple Choice

The most frequently stated cause for Down syndrome is

• A) a recessive gene.
• B) seasonal fluctuations of hormones.
• C) exposure to X-rays and pesticides.
• D) an accident in chromosome distribution.

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Definitions:

Added To Population

The process or event of introducing new individuals to an existing group or biological population, thereby altering its size or genetic composition.

Births

The act or process of bringing forth offspring or the occurrence of being born.

Immigration

The action of coming to live permanently in a foreign country, differing from emigration, which denotes the act of leaving one's country.

Deaths

The irreversible halt of all biological activities that keep an organism alive, signifying the conclusion of its existence.