Question

For significantly aligning sequences what is the resulting structure on the plot?

(a) Intercrossing lines

(b) Crosses everywhere

(c) Vertical lines

(d) A diagonal and lines parallel to diagonal

This question was posed to me in final exam.

My question is taken from Dot Matrix Sequence Comparison in chapter Sequence Alignment of Bioinformatics

Answer 1

Right option is (d) A diagonal and lines parallel to diagonal

Explanation: If there is alignment of sequences there is a significantly bold diagonal visible on the plot. And if the is a bit imperfect, the diagonal is shattered too to an extent and forms small parallel lines to it.