The Sea Snake Is Resistant to Poisoning by the Puffer

The sea snake is resistant to poisoning by the puffer fish sodium channel toxin tetrodoxin (TTX) .To determine which regions of the sea snake sodium channel confer resistance, a researcher can _______ the sea snake sodium channel genes.

A) map the missense mutations of
B) compare the rates of synonymous and nonsynonymous nucleotide substitutions within
C) determine the rate of genetic drift within
D) quantify the number of gene duplications within
E) map the sequence deletions within