Marfan syndrome is the result of inheriting a single allele. Individuals with Marfan syndrome are tall and long-limbed,and have both cardiovascular and eye defects. The inheritance of Marfan syndrome is an example of ______.
A) codominance
B) a recessive disorder
C) pleiotropy
D) incomplete dominance

Question

Quizplus · Accepted Answer

Marfan syndrome is an example of pleiotropy because the single allele affects multiple traits, including height, limb length, cardiovascular system, and eyes. It is not an example of codominance or incomplete dominance because there is no blending or equal expression of alleles. It is also not a recessive disorder because inheriting only one allele is enough to cause the syndrome.

Marfan Syndrome Is the Result of Inheriting a Single Allele