Which piece of evidence is most likely to indicate a gene within a genome?
A)A unique sequence within a genome is 80% similar in human, mouse, and zebrafish.
B)A sequence is unique to a nematode genome.
C)An identical open reading frame is found in two species of fruit fly.
D)A sequence is repeated multiple times in the human genome.
E)A sequence is 50% identical between human and chimp but does not include an open reading frame.

Question

Quizplus · Accepted Answer

A unique sequence that is highly similar across different species (human, mouse, and zebrafish in this case) suggests a conserved function, which is often indicative of a gene. Conservation across species implies that the sequence has been maintained through evolution due to its importance, likely because it codes for a protein or has a regulatory function.

Which Piece of Evidence Is Most Likely to Indicate a Gene