Hypokinetic movements include: 1  Bradykinesia. 2  Freezing. 3  Rigidity. 4  Postural instability.
1 Missense-the change in nucleotide leads for a different amino acid. 2  This may have little effect, or it may greatly change the resulting protein. 3  Silent-this type of point mutation is the least harmful as there is no noticeable effect on the protein.
Genes can become mutated for various reasons, and mutations can occur in several different ways. The simplest type of mutation is a substitution of a different DNA base. For example, thymine (T) may replace adenine (A), which could change the message of the gene.