Your Query returns 12 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
Pax1NM_00878010090un    wt    hbs    Pax-1    hunchback    undulated    167411
Pax1XM_23066310116
Pax1NW_04765810116
PAX1AL0355629606167411
PAX1NM_0061929606HUP48    167411
Pax1NT_03921010090167411
Pax1AB08065610090167411
Pax1AB08065710090167411
pax1AJ13350310090167411
pax1AJ13350410090167411
pax1AJ13350510090167411
PAX1NT_0113879606167411

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

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Text2Knowledge ... Yong Huang 2002