Q39 - Coding vs Non-Coding Sequence Signatures in Cross-Species Alignments
Base sequences of two genomic regions (1 and 2) from blue whale (Balaenoptera musculus), sheep (Ovis aries) and hippopotamus (Hippotamus amphibius) were aligned and compared (Fig.).
Base sequences.’–’ is a base deletion, and ‘.’ means the base is the same as in the sequence above.
Figure 1.
Using the information and data, determine which of the statements are true or which are false.
A. Region 1 is most likely a protein coding sequence
B. Region 2 is most likely a protein coding sequence
C. In region 1, the blue whale sequence is longer than the other two, which suggests that sheep and hippopotamus are closer related than either are to the blue whale
D. Regions 1 and 2 show the same phylogenetic relationship among the three species
Question reproduced from IBO 2015, Theoretical Exam B, licensed under CC BY-NC-SA 4.0 - attributed to the International Biology Olympiad. Open the full exam PDF · Community solutions (unofficial)