Hypokinetic movements include: 1  Bradykinesia. 2  Freezing. 3  Rigidity. 4  Postural instability.
Mutations cause changes in the genetic code that lead to genetic variation and the potential to develop disease. Gene mutations can be generally categorized into two types: point mutations and base-pair insertions or deletions. Point mutations are the most common type of gene mutation. Also called a base-pair substitution, this type of mutation changes a single nucleotide base pair.
Point mutations can be subdivided into three types: 1) Nonsense mutations are the ones which code for the same amino acid. 2) Missense mutations occur in the genes which code for different amino acid. 3) Silent mutations do not affect the function of the proteins and code for different or same amino acid.