A short unknown DNA sequence is BLASTed and the top hit is a sea urchin gene with 32 percent identity over only 18 percent of the query length, with E-value = 4.
The most appropriate conclusion is:
- A
Higher E-values indicate stronger matches.
- B
The query is highly conserved across phyla.
- Ccheck_circle
The match is likely due to chance and does not support meaningful homology.
- D
The unknown sequence is a sea urchin gene.
Explanation
E-value of 4 means several random hits of this quality are expected by chance, low coverage and low identity reinforce that this is not a significant match.