People Who Suffer FromMarfan Syndrome Have Disproportionately Long Limbs, a Weakened

question 60

Multiple Choice

People who suffer fromMarfan syndrome have disproportionately long limbs, a weakened aorta, and poor eyesight. All of these characteristics are due to the production of abnormal connective tissue, resulting from a single defective gene. Marfan syndrome is an example of

• A) pleiotropy.
• B) polygenic inheritance.
• C) multiple allelism.
• D) epistasis.
• E) codominance.

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Definitions:

Substance P

A neuropeptide involved in pain perception and the inflammatory response within the body.

Endorphin

Natural peptides produced by the brain that act as neurotransmitters to reduce pain perception and lead to feelings of euphoria.

Serotonin

A neurotransmitter that contributes to feelings of well-being and happiness, also involved in the regulation of mood, sleep, and appetite.

Substance P

A neuropeptide involved in the transmission of pain and other sensory signals to the brain, also implicated in inflammatory processes.