Multiple Choice
Genes from many isolates of the influenza virus have been sequenced.In certain regions of the genome, nonsynonymous substitutions are much more frequent than synonymous substitutions.Which statement is the most likely explanation for this pattern?
A) A great deal of genetic drift is taking place.
B) Most of the amino acid changes are neutral.
C) Strong purifying selection is acting on these genes.
D) Strong positive selection is acting on these genes.
E) Mutations that change the amino acid are disadvantageous.
Correct Answer:
Verified
Correct Answer:
Verified
Q13: To create new antibiotics, biologists are taking
Q14: Researchers suspect that the gene FOXP2, which
Q15: Which statement about a genome is false?<br>A)
Q16: A researcher is studying a metabolic disorder.To
Q17: Refer to the figure, which shows a
Q19: Over evolutionary history, many groups of organisms
Q20: Refer to the figure, which shows a
Q21: Two species of rodents that diverged 15
Q22: Which is the best representation of a
Q23: After obtaining DNA sequences from a variety