Familial or hereditary essential tremor appears to follow an autosomal dominant mode of inheritance. Genes for familial essential tremor have been identified and linked to chromosomes 3q  and 2p  and 6p and some potential related genes.[See attachements and link] However, these gene mutations are rare and a common essential tremor genotype responsible for most familial essential tremor has yet to be identified.Several explanations have been put forth to explain this challenge, including the possibility of mutations in non-coding areas of the genome.

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http://www.ncbi.nlm.nih.gov/pubmed/9288103

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