Your Query returns 4 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
MGC31449NM_01040410090HAP-1    Hap1   
MGC31449NM_17798110090HAP-1    Hap1   
MGC31449BC05304310090HAP-1    Hap1   
MGC31449BC03408910090HAP-1    Hap1   

Search Again
* OMIM link based on symbol match for human and mouse.

Google

Text2Knowledge ... Yong Huang 2002