This is an alternate content page containing a Tabbed Info Activity. It has opened in a new window.
The tabs have an information section with a title and might have additional content and/or images.

Tab Title: Point mutations

Tab Content:

Point mutations result from a single base substitution

a. Transitions - Substitution of a purine or pyrimidine by another purine or pyrimidine

b. Transversions - Substitution of purine by a pyrimidine or vice versa

Tab Title: Deletion and insertion mutations

Tab Content:

Deletion or insertion of one or more nucleotides in the DNA. If the mutation occurs in the coding region, the mutation may cause a shift in the reading frame of the genetic message (frame-shift mutations). A frame-shift mutation occurs when the insertion or deletion results in a change of the codon (three nucleotides) from the point of insertion or deletion.


Close this window.