[ExI] genetic lottery

[spike]

A friend of mine has won the genetic lottery: three years ago he attended
his great granddaughter's college graduation.

 

Estimate please: how rare is this?  Three sigma case?

 

Yesterday the results came back from his DNA test.  I am hoping to obtain
the first known four-generation collection of DNA samples.  If my niece will
get with the program, that might become the first five-generation
collection.

 

spike

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