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You have isolated a gene sequence from the mustard plant Arabidopsis and have BLAST searched the NCBI database. Your sequence hit several EST sequences that were identified as transcription factors. These sequences were found in E.coli, Chlamydomonas (a green algae), yeast, mice, and humans and only had a few base pair differences.
-What can be said about this sequence?
A)It appears to be highly conserved.
B)It has had many duplication events.
C)It is an ancient gene.
D)This sequence has been transposed to other species.
E)It must be junk DNA.

Question

Quizplus · Accepted Answer

The fact that the sequence is found across multiple species and only has a few base pair differences suggests that it is highly conserved. This indicates that the gene sequence is likely important and has been retained through evolution.

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