A Man with Trisomy 21 Could Pass Down Syndrome to Offspring

question 15

Multiple Choice

A man with trisomy 21 could pass Down syndrome to offspring if he

• A)produces sperm that have two copies of chromosome 21.
• B)produces sperm lacking chromosome 21.
• C)also has Turner syndrome.
• D)is a carrier of a deletion for chromosome 21.

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Definitions:

Acute Bronchitis

An inflammation of the bronchial tubes, usually caused by viral infection, leading to coughing and difficulty breathing.

Infection

The entry and increase of pathogens such as bacteria, viruses, and parasites that are usually not found inside the body.

Abruptly

Suddenly and unexpectedly, often in a way that seems rude or unanticipated.

Yawning

An involuntary action involving opening the mouth widely and inhaling deeply, often in response to tiredness or boredom.