Results from the study of globin variants indicate that
A) all amino acid substitutions cause severe phenotypic effects.
B) the alteration of one amino acid can cause a genetic disease.
C) extended chains do not function to carry oxygen.
D) all mutations in globin are caused by changes in amino acids.
E) none of these is indicated.

Question

Quizplus · Accepted Answer

The study of globin variants shows that the alteration of one amino acid can cause a genetic disease, indicating that not all amino acid substitutions cause severe phenotypic effects. This also implies that not all mutations in globin are caused by changes in amino acids. The fact that globin chains function to carry oxygen is well-established, so option C is incorrect, and option E is too broad and doesn't capture any of the information from the question stem.

Results from the Study of Globin Variants Indicate That