Figure 263

Multiple Choice

Figure 26.3. Morphologically, species A is very similar to four other species, B-E. Yet the nucleotide sequence deep within an intron in a gene shared by all five of these eukaryotic species is quite different in species A compared to that of the other four species when we study the nucleotides present at each position.
-If the sequence of species A in Figure 26.3 differs from that of the other four species due to simple misalignment, then what should the computer software find when it compares the sequence of species A to those of the other four species?

A) The nucleotide at position 1 should be different in species A, but the same in species B-E.
B) The nucleotide sequence of species A should have long sequences that are nearly identical to those of the other species, but offset in terms of position number.
C) The sequences of species B-E, though different from that of species A, should be identical to each other, without exception.
D) If the software compares the amino acid sequence of the actual protein product rather than the nucleotide sequence, then the amino acid sequences of species B-E should be similar to each other, but very different from that of species A.
E) Computer software is useless in determining sequences of introns; it can only be used with exons.