Entity Framework 6 inheritance strategy defaults.
Table per Hierarchy (TPH) - one table for all types with type discriminator column
Table per Concrete Type (TPC) - one table per concrete type with common properties copied in each table

From http://weblogs.asp.net/manavi/archive/2010/12/24/inheritance-mapping-strategies-with-entity-framework-code-first-ctp5-part-1-table-per-hierarchy-tph.aspx