Wednesday, 29 January 2014

How much DNA do you share with your father's aunt's great-uncle's brother?

Its the type of question that now sends me to Wolfram Alpha. Go to and type in the query. The result is a diagram showing the relationship and a table including the information that the person may be a great great granduncle with a blood relationship fraction of 1/64 (1.5625%) or great great grandfather, 1/16 (6.25%).

I've written suggesting they add the average number of centimorgans to the table.


turner said...

What's a centimorgan?


JDR said...

Check the definition at