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Fact Check: The Misunderstood Centimorgan

July 29, 2023 thednageek 29d Comments

What is a centimorgan, anyway?

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Posted in: Making Sense of DNA Filed under: centimorgan, definition
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Noble Cause, No Rules

June 27, 2023 thednageek 40d Comments

This post has been updated. The Terms and Conditions at MyHeritage state: Using the DNA Services for law enforcement purposes,…

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Posted in: Forensic Genetic Genealogy Filed under: Department of Justice, ethics, forensic genetic genealogy, law enforcement, MyHeritage DNA, Terms of Service
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Fact Check: Do Half Relationships “Fade” Faster?

June 26, 2023 thednageek 3d Comments

QUESTION: A reader contacted me recently to ask: Is it true that half-relationship DNA “fades” faster? And if that’s the…

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Posted in: Making Sense of DNA Filed under: autosomal DNA, half relationships, relationship prediction
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Between Full and Half: Three-quarter Siblings

June 16, 2023 thednageek 15d Comments

Oops!  I’ve made an error in some of the analyses for this post.  I will update it as soon as…

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Posted in: Making Sense of DNA Filed under: full siblings, fully-identical regions, half siblings, half-identical regions, histograms, Ped-sim, relationship prediction, segment number, simulations, three-quarter siblings
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The Award for Best Relationship Predictor Goes to …

June 9, 2023 thednageek 6d Comments

Relationship Predictor Survey The Relationship Predictor Survey was launched in March 2023 to collect large-scale data from citizen scientists (like…

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Posted in: Making Sense of DNA Filed under: age, AncestryDNA, MyHeritage DNA, predicted relationships, relationship prediction, shared centimorgans, Shared cM Tool
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The Science Behind Relationship Predictors

May 27, 2023 thednageek 8d Comments

Relationship Predictor Survey There are now several tools that predict which genealogical relationships are most likely for given amounts of…

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Posted in: Making Sense of DNA Filed under: cM Explainer, MyHeritage DNA, relationship prediction, shared centimorgans, Shared cM Project, Shared cM Tool
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Rules? We Don’t Need No Stinkin’ Rules

May 20, 2023 thednageek 99d Comments

In a fit of anger, William Leslie Arnold murdered his parents in 1958 in Nebraska. He escaped jail in 1967,…

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Posted in: Forensic Genetic Genealogy Filed under: 23andMe, AncestryDNA, Department of Justice, ethics, forensic genetic genealogy, MyHeritage DNA, Othram, Parabon NanoLabs

In Which Citizen Science Finds an Error, and the Error Is Fixed

May 2, 2023 thednageek 9d Comments

A key reason to evaluate our DNA tools is to improve them. After all, that’s how science works: a perennial…

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Posted in: Making Sense of DNA Filed under: anomalies, DNA Painter, relationship prediction, shared centimorgans, Shared cM Project, Shared cM Tool
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The Relationship Predictor Comparison: A First Peek

April 11, 2023 thednageek 20d Comments

How much do ages improve the new relationship predictions at MyHeritage? Here’s a sneak peek into a longer-term study.

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Posted in: Making Sense of DNA Filed under: age, AncestryDNA, cM Explainer, MyHeritage DNA, relationship prediction, shared centimorgans, Shared cM Tool
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Relationship Prediction Tools: Which Is Best?

March 15, 2023 thednageek 27d Comments

Science is like a ratchet. Each discovery builds upon previous work, and ideas that withstand scrutiny become stepping stones to…

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Posted in: Making Sense of DNA Filed under: AncestryDNA, cM Explainer, MyHeritage DNA, predicted relationships, relationship prediction, Shared cM Project, Shared cM Tool

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