Advanced DNA Techniques: Deductive Chromosome Mapping

Blaine Bettinger, Ph.D., J.D.
Oct 5, 2020
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About this webinar

Chromosome mapping is typically achieved by mapping the segments of DNA we share with an identified match. In this lecture, learn how to map segments of DNA that you DO NOT share with a match! Using close relatives such as parents or siblings we can figure out where pieces of DNA came from based on lack of sharing.

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About the speaker

Blaine Bettinger, Ph.D., J.D., is a professional genealogist specializing in DNA evidence. In 2007 he started The Genetic Genealogist ( www.thegeneticgenealogist.com ), one of the earliest blogs on th...
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  1. LT
    Legacy Family Tree
    5 years ago

    Very clear and concise. I actually followed!! I'm anxious to try it on my own.\n\nVery clear explanation of topic. Thank you for offering free webinars.\n\nVery clear presentation! Thank you Blaine.\n\nVery clear presentation. Thanks, Blaine!\n\nVery clear speaker.\n\nVery clear, reinforced concepts which is excellent since I did get confused between maternal/paternal\n\nVery clear, step through. Only additional information I would like would be using a match to a second cousin. \n\nVery clear, thank you!\n\nVery clearly explained as usual.\n\nVery clearly presented!\n\nVery clearly spoken, and each piece of information was clearly explained before moving on. Excellent presenter.\n\nVery detailed and this about my 4th webinar about this subject\n\nVery easy to follow.\n\nVery good and useful info but presentation was overly repetitive. \n\nVery good explanation. Easy to follow.\n\nVery good information we will be able to use. Thank you!\n\nVery good, clear instruction. Liked it a lot!\n\nVery good, Would appreciate a bit more depth. Would enjoy a webinar with both visual phasing and deductive mapping used concurrently and cross referenced. It was just a tiny bit slow going. So 4.5 would be my real rating.\n\nVery helpful! Thanks!\n\nVery illluminating!\n\nVery informative and helpful. Thank you!\n\nVery informative and I got it totally. Can't wait to apply it.\n\nVery informative with easy to understand examples - Thank you!\n\nVery informative! Blaine is always excellent! Thanks!\n\nVery informative! I always learn valuable tips and techniques from any of Blaine's lectures.\n\nVery informative, going to give it a go today. Thank You\n\nVery informative. Anxious to try it.\n\nvery interesting a lot was covered\n\nVery interesting! Thank you!\n\nVery interesting.\n\nVery interesting.\n\nVery interesting.... perhaps a little advanced for me but definitely added to my understanding of utilization of DNA matches\n\nVery precise examples and the speed at which Blaine spoke made it an informative session\n\nVery stimulating presentation, great to have my understanding of this subject clarified, thanks, Blaine.\n\nVery Understandable\n\nVery useful although I am still at beginner stage\n\nvery useful technique very well explained\n\nvery well explained\n\nvery well presented !\n\nWasn't as advanced as I expected, having already done visual phasing, \n\nWatched this because of Blaine!!\n\nWe always get better insight into DNA from Dr. Bettinger. And he makes it so easy to understand. Thank you very much.\n\nWell explained - I've found a new way to occupy hours of my day\n\nWell presented and easy to understand. Thank you!\n\nwell presented!\n\nWhat a fantastic step forward -- it is great that an advanced session is being presented in clear terms but without having to cover basics.\n\nWhat I enjoy about Blaine's webinars is that he doesn't teach at the lowest common denominator level. He is brilliant, what else is there to say?\n\nWonderful\n\nwonderful and Blaine's explanations are clear and easily understood\n\nWonderful information!\n\nWonderful, wonderful webinar of using Deductive Chromosome Mapping. The light did come on for me also.\n\nWow! Anxious to get started!\n\nWow, I learned a lot! \n\nWow. Just wish my parents and siblings were alive to collect DNA from so I could map them

  2. LT
    Legacy Family Tree
    5 years ago

    Love getting taught by Blaine. He is one of my favorite presenters, and this explanation of Chromosome Mapping was excellent. Thanks Blaine.\n\nLove those light-bulb moments! Thanks!\n\nLoved the advanced level of utilizing DNA\n\nMakes use of those black spaces that I never thought about before. Thanks, Blaine.\n\nmind blown! great info...keep it coming!\n\nMost helpful webinar on DNA I've ever watched. Can't wait to test my sister!!\n\nMy mind was blown! Blaine Bettinger makes a complicated process feel so simple! He gives me hope that I can use my DNA matches to figure out my great grandmother's side of my family tree!\n\nNever a disappointment with Blaine Bettinger!\n\nNew advanced technique, well explained by Blaine.\n\nNow I have a name for something I've been doing for a long time. I'm a very logical person though so I figured it out on my own.\n\nOne of the best !\n\nOne of the best on Genetic Genealogy I've seen, ever. So glad I'll be able to view it again, as a (long time) Legacy Webinar subscriber. Thanks to both Legacy Webinars and Blaine T Bettinger.\n\nOne of the best webminar I had here yet! Thanks to Blaine!\n\nOrganized, logical and to the point. I was waiting for someone to explain relationships and mapping your grandparents dan using your siblings. Thank you Blaine"\n\nOutstanding session!!!\n\nOutstanding!!\n\nOutstanding!!!!!\n\nReally enjoy Blaine's presentations.\n\nReally enjoyed this, thank you!\n\nReally nice to remember to watch one live. This year is my 3rd year for membership. It is such a benefit- I cant always make a conference - but I can learn new things with the webinars.\n\nReceived valuable information for my research. Thank you!\n\nSimple - not to broad a subject like some are. I could understand the concept as it was explained in detail.\n\nSimple and easy to understand. Thanks!\n\nSimple, clear, concise explanation of deductive mapping with two examples... loved it!\n\nSo clear. Blaine made a difficult subject easy to understand.\n\nSo pleased I was on holidays and could view very useful.\n\nSo well done. Even tho' I haven't spent a lot of time on chromosome mapping, Blaine did such a good job explaining his deductive mapping, that I was able to understand it easily. Thank you!\n\nSpeaker kept his presentation simple and too the point.\n\nStupendous presentation-clear and concise!\n\nSuccinct, concise, and clear! A great way to break down an advanced topic!\n\nSuch a complex topic but Blaine explained it so clearly. Tomorrow I will give it a try!\n\nSuper\n\nSuper and I actually understood it.\n\nSuperb---need more like this.\n\nsuperstar with great information and presentation!\n\nTerrific!!\n\nThank you- very informative!\n\nThank you!\n\nThanks Blaine for a wonderful webinar. As usual, you explain even difficult topics with amazing clarity. I've been trying to get my head around this topic for ages, but now I feel confident that I finally understand it! Can't wait to start mapping deductively!!\n\nThanks Blaine. Awesome webinar - very clear. You make a complex topic understandable. Thanks Legacy for providing these webinars!\n\nThe concept of deductive chromosome mapping finally makes sense to me. Thank you, Blaine B!\n\nThis is amazing stuff! And Blaine, as always, explained it so well.\n\nThis was a lightbulb moment for me!\n\nThis was a very good intro to deductive chromosome mapping. I would like to know applications of how to use this info and also to know if you can use the info to expand/broaden beyond one generation? Thanks!\n\nThis was great!\n\nThis was great. Very clear and informative.\n\nThis webinar may help me to finally differentiate dna between my deceased parents that I was unable to test. As usual, Blaine has demystyfied DNA so a lay person can better understand. Thanks Blaine and thank you Legacy Webinars for continuing to bring great educational programs for better research techniques. \n\nThis webinar was very enlightening and informative. Very, very helpful in comparing sibling & cousin DNA differences. Blaine explained the process in a way that was easy to comprehend.\n\ntop notch\n\nunbelievable good!\n\nUnfortunately came in just at the end--looking forward to the replay tomorrow! Good night, everyone!

  3. LT
    Legacy Family Tree
    5 years ago

    GREAT INFO!\n\nGreat info! I wish he showed a parent for deductive mapping!\n\nGreat information...easy to understand.\n\nGreat lecture and so easy to understand. Thank you. \n\ngreat material\n\nGreat presentation. Presented in a way that was easy to understand.\n\nGreat slides.\n\nGreat topic. The speaker was very detailed so that everyone would understand the process.\n\nGreat webinar as always. Thanks for organising Geoff. \n\nGreat!\n\nHe explained it very well.\n\nHe really does good explanations so I learn more and more about DNA.\n\nHis presentation made me want to try the DNA printer program and also use the Deductive mapping with cousins to find out more information about our shared grandfather.\n\nI always enjoy Blaine's talks and explanations about DNA!\n\nI always learn a ton from Blaine's lectures, but I have to say that this one tonight really blew my mind! I'm so excited to get my siblings tested and try this methodology out! Thank you -\n\nI always learn something new from Blaine!\n\nI couldn't stay for the whole webinar, but what I heard was great! Thanks for making it available at a good time for us in Australia.\n\nI don't think of myself as an advanced dna user but decided to take the webinar anyway in hopes I might pick up something. Mr. Bettinger explained the process so systematically and logically, I'm excited to get started on my own chromosone painting. \n\nI enjoyed the webinar and it clarified mapping. Thank you so much.\n\nI feel like I discovered another piece to a puzzle. Great job of explaining it.\n\nI had to stop watching after about half an hour, but the webinar looks like just what I need to help me maximize what I can learn from having tested other family members. I'm looking forward to finishing the webinar once it's in the archives. Thank you, Blaine!\n\nI know now that I need more relatives to do their DNA to check for matches and differences.\n\nI learn a little more with every webinar. DNA and chromosomes are hard for me to grasp.\n\nI missed a few minutes in the beginning, but overall very good! Thank you, Lisa\n\nI really enjoyed the examples showing application of using this Deductive Chromosome Mapping technique. Thanks!\n\nI watched knowing that I, as an only child with no living parents or first cousins that will test, would not be able to use this technique. However, I GET it- and maybe I'll be able to help others in my genealogy group use it. Blaine is always an excellent presenter- he knows how to break a subject down and keep adding just a bit more so you really can understand. By the end, a complex topic is now understandable. \n\nI would give it a higher rating if possible. Excellent!\n\nI'd rate him a 10 if I could! \n\nI'm actually just still starting with DNA, but I still learned a lot in terms of the windows that DNA mapping can open. Fabulous class - everything so thoroughly explained that even I grasped the concepts! Thank you!\n\nIn-depth, knowledgeable, with lots of presentation materials to break it down which made it comprehensible.\n\nInteresting info and presented very well.\n\nIs there any way I can give this webinar a rating of 10?\n\nIt is interesting that for DNA Painter, Jonny says not to use siblings; however, that is exactly what you need for this type of chromosome mapping. Very interesting to think there is often more information than we know right in front of us.\n\nIt is time-consuming to state things clearly, but glad Blaine does it that way. \n\nIt makes perfect sense what Blaine explained. I’ve worked with DNA painter a bit but am unsure on how it will move my search for ancestors forward\n\nIt was a very good presentation and Blaine explains it so well. The suggestion to draw it out will help to prevent confusion. I'm eager to try this!\n\nIt was great to have a webinar on advanced DNA techniques.\n\nIt was great. Can't wait to try what was taught!\n\nIt was indeed a light bulb moment. Thanks, Blaine.\n\nIt was very helpful to me. The description could have mentioned that it is useful only when you are certain of the relationship of the match.\n\nI've done Visual Phasing so this was great to see how to actually use the Deductive process. I've thought I could do it but now know how to do it properly. Thanks Blaine for another exremely well explained and clearly demonstrated process to add to my DNA kit!\n\nI've had a eureka moment or two during this webinar. Blaine at his finest. \n\nI've heard the concept, but it was a good visual to help with the explanation.\n\njust great, thank you\n\nLooking forward to more DNA webinars on the Advanced Level!\n\nLots more to learn

  4. LT
    Legacy Family Tree
    5 years ago

    excellent - i have 4 mapped siblings - this should be fun - thank you \n\nExcellent - very clear and easy to follow logic. \n\nExcellent as always so clear and helpful for non science people like me\n\nExcellent as always! Thanks, Blaine! \n\nExcellent content and presented in such an easy-to-understand way. Blaine is an excellent presenter. Thank you!\n\nExcellent explanation on a difficult topic.\n\nExcellent explanation. Now I need to do it!\n\nExcellent explanations by Blaine. He made things very clear.\n\nExcellent information, very well presented. I especially appreciated the visuals! Thank you!\n\nExcellent information. \n\nExcellent job - light bulb moments here too\n\nExcellent one of the very best. \n\nExcellent presentation (as expected!). \n\nEXCELLENT PRESENTATION and EXPLANATIONS!!!!!!\n\nexcellent presentation and topic\n\nExcellent presentation by Blaine Bettinger, as always.\n\nExcellent presentation of an advanced subject.\n\nExcellent presentation! I'm going to go back to the beginning of my painting and make far better use of my siblings dna results!! Thank you!\n\nExcellent presentation! Blaine made a complex topic seem easy. I'll know for sure once I apply the techniques, but I am walking away with some confidence about understanding the topic!\n\nExcellent presentation, it helped reinforce that I'm acutally getting it when it comes genetic DNA stuff :).\n\nExcellent presentation, very informative.\n\nExcellent presentation, very well laid out and organized.\n\nExcellent presentation.\n\nExcellent presentation. Can’t wait to try.\n\nExcellent topic and well explained\n\nExcellent webinar that provided many avenues for future research!\n\nEXCELLENT!\n\nExcellent!\n\nExcellent!\n\nExcellent! Getting my two sisters tested ASAP!\n\nExcellent! Blaine is a great presenter. Interesting and clear. Can't wait to try this technique!\n\nExcellent! Thanks!\n\nExcellent!!!! This clarified some of my questions about the use of chromosome comparisons. \n\nExcellent, of course! More, please, soon! Thanks to Blaine Bettinger!\n\nExcellent. I appreciate how Blaine was able to so clearly explain a complex concept. Very helpful!\n\nExcellent. Look forward to trying this.\n\nExcellent. Thank you.\n\nExceptionally well presented. I learned a lot. Thanks so much.\n\nExplained very well\n\nExtremely interesting\n\nFabulous!\n\nFabulous! Thanks Blaine. Excellent, clear explanations as usual!\n\nFantastic session. Blaine has a gift for making things east to understand.\n\nFantastic webinar!\n\nFantastic! I just wish I had siblings willing to test and share.\n\nFantastic. Definitely advanced, and glad that this was explained at the start.\n\nfascinating!\n\nFascinating. My sister has also tested (Ancestry) and I will have to get her to upload to GEDmatch so I can try this out. Thank you!\n\nFascinating. Look forward to trying out the new learning. Thank you.\n\nFor an "Advanced" webinar there was a lot of basic training\n\nGlad to see the complete focus on deductive mapping -- Michelle included it in her talk (as inferred mapping) and did a good job on it, but it really needed a fully dedicated webinar -- if I am not mistaken, Louis Kessler (who won best innovation at RootsTech a few years ago) was the "inventor" of this\n\nGood audio, well presented\n\nGreat info so far but this is more advanced than my knowledge right now.

  5. LT
    Legacy Family Tree
    5 years ago

    Blaine explains complicated things so simply and easy to understand- my favourite presenter!\n\nBlaine explains everything so well, and is very easy to listen to.\n\nBlaine has such a clear way of explaining difficult concepts. Thank you Blaine, and thank you Geoff!\n\nBlaine is a pro and a blessing to all of gene-world. He brings it every time.\n\nBlaine is a wonderful teacher; good pace, excellent speech, patient with facts, and repeats. I am sure I will spend too much time with this new approach...\n\nBlaine is always an excellent presenter.\n\nBlaine is always good \n\nBlaine is ALWAYS great. This webinar was billed as "Advanced" & I expected to be out of my depth because I've not done chrom mapping &, despite webinars on it, I feel like I don't fully understand it. Imagine my shock when I had no problem understanding this material.\n\nBlaine is always great. I also feel I took a step forward in understanding this.\n\nBlaine is always outstanding.\n\nBlaine is always wonderful\n\nBlaine is an amazing instructor\n\nBlaine is an awesome speaker. He presents difficult concepts in an easy to understand way. I learned a lot with this webinar and can't wait to put what I learned into action.\n\nBlaine is an excellent instructor both in person and via webinar.\n\nBlaine is an excellent speaker and makes the difficult understandable. \n\nBlaine is an excellent teacher! I'm another one for whom the proverbial lightbulb went off!\n\nBlaine is an excellent teacher. Visuals were very helpful.\n\nBlaine is awesome. Thank you for having him on a webinar. Always learn SOOOOO MUCH!!!!!!\n\nBlaine is great as always.\n\nBlaine is great at explaining things in layman's terms!\n\nBlaine is great, as always!\n\nBlaine is one of the best.\n\nBlaine is so great at explaining things in a stepwise fashion! Very helpful presentation!\n\nBlaine is sooo good at explaining complicated processes in a way that they're understandable! Thank you!\n\nBlaine is the best!\n\nBlaine just has the ability to make DNA become non-threatening\n\nBlaine makes it sound so easy. He is clear and concise. Great presentation.\n\nBlaine was so easy to follow, learnt a lot, just sad that I do not have a sibling/parent/uncle/aunt I can have tested.\n\nBlaine, as usual, explained a potentially confusing topic in an extremely easy and digestible fashion. I will definitely be using deductive chromosome mapping in the future, probably tonight!\n\nBlaine's explanations are always so clear!\n\nBlaine's explanations are very clear. I enjoy every presentation.\n\nBlaine's explanations were very clear.\n\nBlaine's webinars are always informative and helpful.\n\nBrilliant!\n\nCan I give it a 5 ++ ? Blaine is such a clear, logical teacher! Learned some more, enjoyed it thoroughly. Thank you, Blaine\n\nCan't wait to get started mapping!\n\nCan't wait to try this out! Great webinar as always!\n\ncHALLENGING BUT eXCITING!\n\nclear description of technique!!\n\nClear explanations about a fascinating and complex topic\n\nClearly explained - as per Blaine's usual excellent standard.\n\nComplicated but very clear presentation\n\nCrystal clear as usual. Excellent diagrams and example - not overwhelming number of them either. \n\neducational. confirmed my thinking\n\nEnjoy that one concept was presented and thoroughly explained - no overload!\n\nEven though I am just beginning my journey with Chromosome painting, I found Blaine's presentation very clear and was able to understand the principles that he explained. Thank you\n\nExcellent\n\nExcellent\n\nEXCELLENT

  6. LT
    Legacy Family Tree
    5 years ago

    5+++ Blaine was brilliant as usual. He explains things so clearly. He makes the complex doable.\n\nA completely logical technique and very clearly explained. Thank you Blaine\n\nA great webinar from Blaine as usual but I don't have a tester required. I thought I would listen anyway but the hour is late (US) . I will watch the video at a daytime hour. Thanks.\n\nA little simplistic for something advertised as advanced, but very clear.\n\nA real eye-opener for me! Thanks Blaine\n\nA very well thought out and clear presentation with explanatory example slides making it very easy to follow. Blaine, Thanks!\n\nA well paced and useful seminar.\n\nAbsolutely brilliant - I can't wait to get into this - thank you\n\nAbsolutely brilliant webinar. This presentation makes understanding how to review DNA matches, and family connections so interesting and understandable.\n\nAlthough I do not consider myself ready for advance DNA stuff, I was able to follow and understand this lecture. Thanks!\n\nAlways a great presenter and a topic to stretch the mind.\n\nAlways a pleasure having Blaine educate about DNA!\n\nAlways enjoy Blaine Bettinger. Got distracted at the end during questions and answers so I missed what he said about endogimus trees which mine definitely is.\n\nAlways enjoy Blaine's presentations.\n\nAlways enjoy Blaine's presentations.\n\nAlways excellent!\n\nAlways great and understandable info from Blaine. Thanks!\n\nAlways great!\n\nAlways learn from Blaine, Great webinar\n\nAlways learn so much from Blaine. \n\nAlways love Blaine's explanations. He breaks down one simple idea and gives the tools to try something new.\n\nAlways love Blaine's presentations. He has a knack for making the complex simple and easy to understand. Thank you. \n\nAlways top notch from Blaine\n\namazing\n\nAmazing information about concept of deductive dna mapping\n\nAmazing speaker and topic!\n\nAnother fantastic webinar by Blaine. I'm going to be staying up late today!!!\n\nAnother great webinar. Fortunately I was able to watch it live. \n\nAnother great, informative Blaine Bettinger webinar. Thanks\n\nAnother layer of knowledge. All of Blaine's webinars are first rate!\n\nAnother outstanding technique for tracking our ancestors using DNA! Thanks Blaine!\n\nAnything by Blaine is very worthwhile!\n\nAs always Blaine is great.\n\nas always, blaine explain at a level expected. wonderful detail, slides and information.\n\nAs always, Blaine gave an outstanding talk. Can't wait to try what I have learned.\n\nas always, well presented and explained\n\nAs usual a great informative and easy to follow webinar from Blaine. I am already busy using some deductive mapping.\n\nAs usual...Outstanding presentation by Blaine...\n\nBest ever! Thank you Blaine- it took awhile- but now it's all clicked in.\n\nBettinger is SO clear and takes the new info step by step, returning to previous material to pound it in our heads. I will be watching ALL his webinars--and checking out his Facebook page too!\n\nBlain is a very good presenter. He really emphasized some critical points that otherwise might be lost on relatively new people (like me) . :)\n\nBlaine always does a great job of explaining DNA concepts. \n\nBlaine Bettinger is hands-down one of the best DNA presenters I've ever watched. He explains everything so thoroughly and makes it easy to grasp challenging topics.\n\nBlaine Bettinger is so good at explaining his subject and I'm always so motivated to try out what he has presented. Excellent presentation. \n\nBlaine Bettinger is the BEST!\n\nBlaine Bettinger is the most knowledgeable writer, blogger and speaker in the field of genetic genealogy in the world. His presentation was excellent ! \n\nBlaine continues to excel at presenting helpful information in an understandable and inspirational way. Thanks, Blaine!\n\nBlaine did an excellent job of explaining his deductive chromosome mapping technique. Would highly recommend this webinar to folks who are deeply into chromosome mapping.\n\nBlaine did an excellent job of explaining how to use deductive chromosome mapping.\n\nBlaine does an amazing job of explaining an advanced topic and making it seem like a beginner's skill.