The brother and sister inherited their DNA from the same parents but because of the way DNA works they did not receive the same DNA from each parent. The Brother may have received 55% from his father and 45% from his mother while his sister may have received 45% from her father and 55% from her mother. They are still brother and sister. Now they both take a Family Finder DNA test and the both get a match with Mr. Y. The brother matches him with 257 cm and the sister matches him with 117 cm. This is because the brother inherited more of the DNA that matches Mr. Y and the sister less. This is because siblings do not receive the same DNA and the same snips from their parents unless they are identical twins.
Until you can identify a common ancestor you will not know whether Mr. Y matches the father or the mother unless you have tested enough of the family to have the Parental matching feature at FTDNA identify which parental line of the brother and sister he is related to. Just because he matches the brother with 257 cm does not mean it is the fathers line he could have inherited that from the mother. Rick Family Tree DNA Co-Administrator Azores DNA Project Azores DNA Project Co-Administrators All unpaid volunteers Cheri Mello – <mailto:gfsche...@gmail.com> gfsche...@gmail.com Rick Pimentel – richard.francis.pimen...@gmail.com From: azores@googlegroups.com [mailto:azores@googlegroups.com] On Behalf Of "E" Sharp Sent: Tuesday, January 2, 2018 6:57 PM To: azores Subject: [AZORES-Genealogy] Family Finder Matches Question If a sister does a Family Finder DNA with her brother and they match as siblings and on their matches they match another unknown male...the sister match is 117 centimorgans and the brother's match is 257 centimorgans....any relevant meaning of this....i.e. would this unknown male match the male line more than the female line or................?? "E" -- You received this message because you are subscribed to the Google Groups "Azores Genealogy" group. To unsubscribe from this group and stop receiving emails from it, send an email to azores+unsubscr...@googlegroups.com. Visit this group at https://groups.google.com/group/azores. -- You received this message because you are subscribed to the Google Groups "Azores Genealogy" group. To unsubscribe from this group and stop receiving emails from it, send an email to azores+unsubscr...@googlegroups.com. Visit this group at https://groups.google.com/group/azores.
