1 A solid. 2  There is one unusual exception. 3  Native mercury is a mineral and is the only metal that is a liquid at normal temperatures. 4  Has a regular crystal structure. A solid. 2  There is one unusual exception. 3  Native mercury is a mineral and is the only metal that is a liquid at normal temperatures. 4  Has a regular crystal structure.
A frameshift mutation (also called a framing error or a reading frame shift) is a genetic mutation caused by indels (insertions or deletions) of a number of nucleotides in a DNA sequence that is not divisible by three.
Such type of mutations are not considered frameshift mutations because the reading frame is not altered. A frameshift mutation is caused by an insertion or deletion of base pairs in DNA sequence, which causes a shift in the translational reading frame. Frameshift mutations have a more dramatic effect on the polypeptide as compare to other mutations.