SMGF Animations Reborn

SMGF Animations

For those of you who used to refer people to the Sorenson animations about how DNA works, before Ancestry “discontinued” the data base, the data base loss was a double whammy because the animations were gone, as well as the data.

These animations have resurfaced at the University of Utah Health Sciences page. I don’t know how they got there, but thank you and hurray!!!

Click here and take a tour!!!

10 thoughts on “SMGF Animations Reborn

  1. I checked right now with the link you provided since I had bookmarked that either late 2014 or early 2015 and it is the same link. So I guess they had it like that for awhile.

  2. Actually, the animations have always been available at the University of Utah site. They were commissioned by SMGF. The SMGF site included some other educational material on the same page, so I would always use that link (plus it was shorter!)

  3. Thanks! Watched it again. Is it correct that when the father passes the X chromo to his daughter, it does NOT go through recombination? What about the thresholds for the X according to gender, etc. If it does not go through recombination, would the cMs always be the same, and why would they need a stated threshold?. I am not making any sense, sorry.

    This is probably a link that should be posted over at Ancestry. But, not by me. Too many attack dogs over there – the traditional genealogists. They do not want to hear one word about DNA because they do not believe in it, and if you utter the word, they will go after you – just my experience.. LOL

    • The father’s X cannot go through recombination because he only has one copy, the copy from his mother. So he gives his only copy, intact, to his daughter. And that copy is his mother’s X which is a recombination of her mother and father.

    • AFAIK, 23andMe is the only company to incorporate the X into their matching algorithm. They set different thresholds for male-to-male comparisons (which are lower than autosomal thresholds because the results are essentially phased) vs female-female comparisons (which are higher than autosomal thresholds because the X has spent at least part of its history passing unrecombined through a male).

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