Many have asked for some suggestions for strategies used in the visual phasing of grandparents when parents are deceased. I put together a step-by-step PDF file from a PowerPoint presentation. It utilizes crossover points derived from comparisons through GEDmatch. I can explain each step once the slides load. I have permission from this family to discuss the results. The ultimate goal is to show matching between siblings and each set of grandparents for one chromosome.
Segment Matches with Grandparents Using Crossover Lines
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Originally posted by Kathy Johnston View PostMany have asked for some suggestions for strategies used in the visual phasing of grandparents when parents are deceased. I put together a step-by-step PDF file from a PowerPoint presentation. It utilizes crossover points derived from comparisons through GEDmatch. I can explain each step once the slides load. I have permission from this family to discuss the results. The ultimate goal is to show matching between siblings and each set of grandparents for one chromosome.
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I will soon have the results back from my four full siblings to add to mine, giving me an excellent opportunity to try out this process.
I have a couple of questions, though. Each chromosome has two halves, but GEDmatch supplies only a single line of commonality. Consider the simplest situation, where siblings A and B match one side of a chromosome exactly, and they have one break-point on the other side. Will GEDmatch show that they match 100% on the entire chromosome, or will the break-point be visible? If the break-point is visible, how would I know that the opposite side is a complete match?
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Originally posted by Bob Hesse View PostI will soon have the results back from my four full siblings to add to mine, giving me an excellent opportunity to try out this process.
I have a couple of questions, though. Each chromosome has two halves, but GEDmatch supplies only a single line of commonality. Consider the simplest situation, where siblings A and B match one side of a chromosome exactly, and they have one break-point on the other side. Will GEDmatch show that they match 100% on the entire chromosome, or will the break-point be visible? If the break-point is visible, how would I know that the opposite side is a complete match?
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