Archive | March 2022

How Did We Became Humans?

One of the great mysteries of prehistory for me is how intelligent apes became modern humans. There are many fascinating books on this topic; most of them just guessing as the scientific evidence is slim to non existent. However in recent years, breakthroughs in analyzing ancient DNA have given us some tantalizing hints.

A chimpanzee in the San Diego Zoo (my photo)

First off, our closest ape relatives have 24 chromosome pairs while we have 23. Our chromosome 2 is a fusion of two chromosomes found in other primates. This is not as uncommon an occurrence as it might sound. All the same information is there, just repackaged. Thus the first 23 chromosome person could have children with a 24 chromosome mate. Wild horses and tame ones also have a one chromosome difference and can have offspring.. Plus there is wide variation in numbers of chromosomes among certain butterflies. Click here for an excellent article on this.

So how did having 23 chromosomes spread in the human population so that it became the norm? The answer is still unknown. Perhaps founder effect, genetic drift, or maybe there was an evolutionary advantage as yet undetermined.

So how did we start to think analytically, speak complex languages, and organize politically? Well a gene that is critical in language development was discovered a few years back – FOXP2. And the human one is different from apes. According to the wikipedia article (click here): “previous genetic analysis had suggested that the H. sapiens FOXP2 gene became fixed in the population around 125,000 years ago. Some researchers consider the Neanderthal findings to indicate that the gene instead swept through the population over 260,000 years ago, before our most recent common ancestor with the Neanderthals.” The sources for these statements are footnoted in the original article.

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Conferences Galore!

The largest genealogy conference in the world, Rootstech is virtual and free again this year. It starts in just a few hours!

For genetic genealogists, i4GG is on again for April 9-10 in San Diego in person, thanks to CeCe Moore. The East Coast is going to have its own genetic genealogy conference, now virtual, ECGGC on April 23-24. Click any name in the preceding to go to the conference site and yes I will be presenting at all of them.

For Rootstech, my recorded talk delves into the details of the case where I found a jewish sperm donor; click here for that or here for the blog post. My very basic talk on using DNA to figure out unknown parentage, which I did for them last year, is still on youtube (click here). Roberta Estes has written a number of helpful posts about Rootstech 2022 – one on how to navigate the website and find what you want (click here) and several on using the find your relatives app  (click here and here)

For i4GG I usually present what’s new at GEDmatch and sometimes more about the latest tools for finding unknown parentage. My 2020 live i4GG talks can still be purchased with all the other great ones from that wonderful last conference before COVID at https://i4gg.org/2020-videos/

At the brand new East Coast Genetic Genealogy Conference (ECGGC), I will give some of my favorite and newly revised talks, live but virtual. The titles below link to the previous versions of my slides but I will make a note here when the slides are updated.

Getting the scoop on new GEDmatch features over lunch with Verogen’s Tom and Brett