This presentation takes the viewer through the results of 5 full brothers who have done a DNA test. It covers the comparison of their ethnicity estimates through to the various differences in their DNA matches including the variance in the sharing amounts. It helps people understand why testing siblings can really enhance their genetic genealogy, even more so if they can not test a parent or parents. The talk will also include a look at some advanced sibling topics, such as utilising X DNA results to establish if two females have the same father, through to advanced tools like visual phasing and creating lazarus kits.
Facebook
X
Syllabus
Chat Log
The last question – about whether you can reconstruct the DNA of the mother if you have the DNA of four sisters and their father – yes, you can! Donna said that the father’s DNA won’t help, but it will! The Lazarus tool at Gedmatch can compare the sisters’ DNA to their father’s. The DNA the sisters don’t share with their father has to come from their mother and that is combined into a Lazarus kit for the mother.
Yes Lazarus does allow you to add the other parent, for example I can add the DNA kit of my mother when reconstructing my father – BUT .. the tool doesn’t actually use it in it’s calculations. It’s been an “oddity” of this tool for many years, so I didn’t go into that detail.
So very interesting, I learned a few things! Now, I know why it’s important to test the siblings! Thank you so much!
Great presentation.
Well organized, interesting study of DNA among brothers, great explanations, and very informative!
Excellent examples and very relatable to actual practice. Some of the best explanations of complex DNA methods I have seen.
Great presentation. A lot of new things for me. I’ll have to watch the replay.
Wonderful presentation!! Loved it!!
I’m really glad to have been able to tune in for this webinar as I am currently working on a project to identify the parents of my great-great-grandfather, and I now see how useful my sister’s DNA, my first cousin’s DNA, my second cousin’s DNA, my third cousins’ DNA, and all of the other DNA available for descendants of this great-great-grandfather will be for this project. Great webinar! Thank you Donna!