Your Query returns 5 Accession Numbers:

Query TermAccessionNCBI TaxonidSynonymsPhenotype (OMIM) *
Foxg1NM_01256010116BF1A    Fkhr    Fkhl1    RATBF1A    Foxo1   
foxg1NM_1310677955bf1    BF-1   
Foxg1NM_00824110090Bf1    BF-1    Hfh9    Hfhbf1   
Foxg1NT_03955110090
Foxg1BC04695810090BF-1    Hfh9    Bf1   

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

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Text2Knowledge ... Yong Huang 2002