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Forms of Marriage







                                       On the Basis of Number of Mates






             MONOGAMY                                                                   POLYGAMY




          SERIAL                NON-SERIAL                      POLYGYNY              POLYANDRY           CENOGAMY
       MONOGAMY                MONOGAMY



                                                             1) SORORAL

                                                              POLYGYNY                 1) FRATERNAL
                                                                                       POLYANDRY
                                                           2) NON-SORORAL
                                                                                         2) NON-
                                                              POLYGYNY                  FRATERNAL

                                                                                       POLYANDRY




                                         On the Basis of rules of mate selection










                                    ENDOGAMY                              EXOGAMYY
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