_:vb50941483 . _:vb50941483 "A monogenic disease that is the result of a mutation that involves the production of one or more copies of a gene."^^ . _:vb50941483 . _:vb50941483 . _:vb50941483 "url:https://www.genome.gov/genetics-glossary/Duplication"^^ . _:vb50941483 "url:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3656685/"^^ . _:vb50941483 .