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    • Research suggests there is a strong genetic component to OCD. The explanation at there is a genetic predisposition to OCD which is generational via reproduction.
    • Research found at first degree relatives of OCD sufferers has 11.7% chance of developing OCD, compared to 2.7% risk in first degree relatives of control participants without OCD
    • Candidate genes are genes identified as potentially causing a disease due to previous knowledge
    • The response of OCD patients to a particular drug therapy have led to suggestion that there are genes relating to serotonin and dopamine involved
    • There is the comt gene which produces the ending comt and therefore more dopamine
    • Genes involving transmission of serotonin across synapse has also been implicated in OCD
    • It is likely that OCD is polygenic and therefore several genes are involved
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