Question

GENETICS...Marfan syndrome in humans is caused by a dominant miutation in a single gene..QUESTION CONTINUES

Marfan syndrome in humans is caused by a dominant miutation in a single gene. Some individuals with Marfan syndrome have only a few distinguishing characteristics (they are tall with long arms and long fingers, for example), but others have life-threatening traits (they also have malformations of the aorta). Marfan syndrome is an example of a trait with

incomplete penetrance

codominance

variable expressivity

lethal allele