A researcher wants to determine the genetic relatedness of several breeds of dog (canis familiaris). the researcher should compare homologous sequences of that are known to be .

The correct answer is "nucleic acids, poorly conserved".

Explanation:

The missing options of this question are:

A) fatty acids; highly conserved

B) lipids; poorly conserved

C) proteins; highly conserved

D) amino acids; highly conserved

E) nucleic acids, poorly conserved

The correct answer is option E) "nucleic acids, poorly conserved".

If a researcher wants to determine genetic relatedness of different breeds in a species, first the researcher needs to compare homologous sequences of nucleic acids. The presence or absence of homologous sequences will determine if two or more breeds are related or not, respectively. Also this homologous sequences must be poorly conserved among breeds, since highly conserved sequences will not be helpful to look for differences.