Which of the Following Statements About Chromosomal Abnormalities Is FALSE

question 48

Multiple Choice

Which of the following statements about chromosomal abnormalities is FALSE?

• A) The most common chromosomal abnormality at birth is Down syndrome.
• B) Both CVS and amniocentesis are done to detect chromosomal abnormalities.
• C) CVS can be performed at any time before a woman gives birth.
• D) Amniocentesis can be performed between weeks 14 and 18.

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Definitions:

Left Bundle Branch

A pathway of heart muscle fibers responsible for conducting electrical impulses to the left side of the heart's ventricles.

Right Bundle Branch

A pathway of cardiac muscle fibers responsible for conducting electrical impulses that regulate heart rhythm to the right ventricle.

Terminal Branch

The end portion of a nerve or blood vessel where it divides into smaller branches, reaching the target tissues or organs.

AV Bundle

The atrioventricular bundle (bundle of His) is a collection of heart muscle cells specialized for electrical conduction that transmits the electrical impulses from the AV node to the point of the apex of the fascicular branches.