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In a dot matrix, two sequences to be compared are written in the _____________ of the matrix.(a) horizontal and vertical axes(b) 2 parallel horizontal axes(c) 2 parallel vertical axes(d) horizontal axis (one preceding another)I have been asked this question in an online interview.This intriguing question comes from Methods topic in section Pairwise Sequence Alignment of Bioinformatics

Answer»

The correct OPTION is (a) horizontal and vertical axes

To elaborate: The comparison is done by scanning each residue of ONE SEQUENCE for similarity with all residues in the other sequence. If a residue match is FOUND, a dot is placed within the graph. Otherwise, the matrix positions are left BLANK.



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