As of late October 2018, Ancestry have released another new display feature on the Match List page: a row below each match displays the number of shared centimorgans and segments. This should be a real time saver when reviewing matches by scanning the page. In combination with the other new feature I posted about, the “no … Read more Another new Ancestry feature – CMs on the Match List Page
I conducted a review in May 2018 of all my DNA matches on Ancestry and recorded whether the match had a public or private tree, and whether a tree was linked to their DNA. I ran the same review three months later in August 2018, having seen an additional 15 hundred matches added during that … Read more How many of my Ancestry Matches have added or removed Trees in the Last 3 Months?
In May 2018 I downloaded the direct line ancestral surnames of all my DNA matches at Ancestry. I discussed some statistical analysis on the numbers in a previous post. I then conducted some exploratory data mining of the distribution of surnames across my matches. My paternal line is African (not African-American), and I have very … Read more The Top 10 Ancestral Surnames across my Ancestry DNA Matches Surprised Me
Previously I discussed an analysis of the availability of trees across all my DNA matches. The headline figures from May 2018 were 40% of my matches had a public linked tree 27% had no linked tree but had at least one public unlinked tree 7% had a private tree 26% had no tree A total … Read more Measuring the Usefulness of Trees of my Ancestry DNA Matches
In previous posts I described the calculations used by several sources to predict the number of cousins we have at different degrees of cousinship (first, second etc). The calculations assume that our ancestors are not related to each other i.e. no first-cousin marriages or other types of inbreeding. If we have a significant number of … Read more How many Irish cousins: the impact of endogamy- Part 4 in Series
My previous blog post was on research by scientists at 23andMe on predicting our number of cousins. I applaud 23andMe for the publication of the research in detail. AncestryDNA have also researched the topic but as far as I can find, they release the information through the marketing department with big headline numbers and not … Read more How many Irish cousins: according to AncestryDNA – Part 3 in Series
Yesterday I wrote a blog post based on an entertaining article from Tim Urban to calculate our number of cousins at various distances using birth rate statistics. Today’s post is based on an academic study by researchers from 23andMe (Henn et al) which covers a wealth of complex analysis that includes a table of “expected … Read more How many Irish cousins: according to 23andMe – Part 2 in Series
Tim Urban wrote an entertaining blog post in 2014 on calculating a ballpark number of cousins based on your country’s average birth statistics. His formula breaks down the totals by degree of cousin i.e. 1st/2nd/3rd/4th and outward. Tim calculates numbers for USA, UK, Canada and a few other countries, but not Ireland – so I … Read more How many Irish cousins: according to Tim Urban – Part 1 in Series