Do nonsynonymous and synonymous changes occur with equal frequency? Explain
What will be an ideal response?
Ans: No. Mutations are found at synonymous sites 10× more frequently than at nonsynonymous sites, most likely because most of the amino acid substitutions were deleterious and therefore eliminated by negative selection.
You might also like to view...
A scientist looking through a microscope at a piece of shoulder muscle would see which of the following features?
A. striated with unbranched fibers B. striated with branched fibers C. nonstriated with unbranched fibers D. nonstriated with branched fibers E. None of the answers for this question are correct.
Which of the following is/are TRUE of cholera?
a. It is a diarrheal disease. b. It is both foodborne and waterborne. c. It is largely restricted to the developing world. d. All of the above are true of cholera.
Municipal water treated with chlorine compounds contains
A) no viruses. B) no bacteria at all. C) no endospores. D) no cysts. E) a decreased microbial load.
Based on the information provided, lactose is likely a(n) __________
a. complex carbohydrate b. protein c. amino acid d. triglyceride