Although the Most Frequent Forms of Down Syndrome Are Caused

question 39

Multiple Choice

Although the most frequent forms of Down syndrome are caused by a random error,nondisjunction of chromosome 21,Down syndrome occasionally runs in families.The cause of this form of familial Down syndrome is ____.

• A)a maternal age effect
• B)a chromosomal aberration involving chromosome 1
• C)an inversion involving chromosome 21
• D)a translocation between chromosome 21 and a member of the D chromosome group
• E)too many X chromosomes

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Definitions:

Hydrocortisone

A steroid hormone produced by the adrenal gland, involved in the body's response to stress, metabolism, immune response, and inflammation regulation.

Blood Stream

The flowing blood within the circulatory system of the body.

Blood Sugar

The concentration of glucose present in the blood, crucial for energy supply to cells and often regulated by hormonal mechanisms.

Heart Rate

The number of heartbeats per unit of time, usually expressed in beats per minute (bpm), indicating the heart's efficiency in circulating blood throughout the body.