Monozygotic Twins Are Unlike Identical Twins in That

question 60

Multiple Choice

Monozygotic twins are unlike identical twins in that:

• A)monozygotic twins develop from a single zygote
• B)identical twins are more likely to be similar in most traits than monozygotic twins
• C)both a and b
• D)neither a nor b.

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Definitions:

Pulmonary Semilunar Valve

A heart valve that is a semilunar valve. It is situated between the right ventricle and the pulmonary trunk.

Right Ventricle

The lower right chamber of the heart that receives deoxygenated blood from the right atrium and pumps it into the lungs via the pulmonary artery.

Pulmonary Semilunar Valve

A valve in the heart located between the right ventricle and the pulmonary artery, preventing backflow of blood into the heart.

Pulmonary Artery Trunk

The main vessel that carries deoxygenated blood from the right ventricle of the heart to the lungs for oxygenation.