If a physician informed you that your speech disorder was the result of problems on chromosomes 4, 7, and 15, you would rightly conclude that the disorder is always classifiable as
A) recessive.
B) polygenic.
C) dominant.
D) sex-linked.

Question

If a physician informed you that your speech disorder was the result of problems on chromosomes 4, 7, and 15, you would rightly conclude that the disorder is always classifiable as
A) ​recessive.
B) ​polygenic.
C) ​dominant.
D) ​sex-linked.

Quizplus · Accepted Answer

Chromosomes 4, 7, and 15 are not involved in determining dominance or recessiveness of a trait. Rather, they contain multiple genes that can contribute to a complex trait like a speech disorder, which would make it polygenic. Sex-linked would refer to a trait carried on a sex chromosome, which is not indicated in this scenario.

If a Physician Informed You That Your Speech Disorder Was