Mitochondrial DNA (mtDNA )is passed only from the females to both their children. So we see that only the members from the 1&2 i.e. the females can contribult their mtDNA for solving the mystery. From 1&2 (1), it is passed to 1-female, 3-female, 5-female, 6-male 1 gets married to 2, and has2 children-Female (1)and Male (3), sine mtDNA is passed only from the females, therefore 3 will no mor pass it on. It will be passed only by 1 to her chldren, and then to their children (they are girls too).For Generation IV, generation I is their great grand parents and 2 is their great-grand mother. For generation V-generation II is their great grand parents and in II-1 is greatgrandmother for 1&2 and ^3&4, 5&6-Generatyion V. 3-Generation II is greatgrand mother for 7, 9,11,12,14. 7-generation II is greatgrand mother for 15,17,19,20,22 (Generation V) 1&2-Generation VI Generation III-1 is greatgrandmother, and for 3 generation VI 4-generation III is greatgrand mother, for 4&5 &6 generation VI -8 is greatgrandmother-noe dead. For 7&8, generation VI-10 Generation 3 is their greatgrandmother.for 9, generation VI 13 is their gteatgrandmother. Solution Mitochondrial DNA (mtDNA )is passed only from the females to both their children. So we see that only the members from the 1&2 i.e. the females can contribult their mtDNA for solving the mystery. From 1&2 (1), it is passed to 1-female, 3-female, 5-female, 6-male 1 gets married to 2, and has2 children-Female (1)and Male (3), sine mtDNA is passed only from the females, therefore 3 will no mor pass it on. It will be passed only by 1 to her chldren, and then to their children (they are girls too).For Generation IV, generation I is their great grand parents and 2 is their great-grand mother. For generation V-generation II is their great grand parents and in II-1 is greatgrandmother for 1&2 and ^3&4, 5&6-Generatyion V. 3-Generation II is greatgrand mother for 7, 9,11,12,14. 7-generation II is greatgrand mother for 15,17,19,20,22 (Generation V) 1&2-Generation VI Generation III-1 is greatgrandmother, and for 3 generation VI 4-generation III is greatgrand mother, for 4&5 &6 generation VI -8 is greatgrandmother-noe dead. For 7&8, generation VI-10 Generation 3 is their greatgrandmother.for 9, generation VI 13 is their gteatgrandmother..