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Genealogy For Dummies, 8th Edition by April Leigh Helm, Matthew L. Helm

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Chapter 12

Autosomal DNA (atDNA) Testing

IN THIS CHAPTER

check Getting your ethnicity estimate

check Finding cousins with autosomal DNA

check Using utilities for autosomal DNA results

Wouldn’t it be great if you could take a single DNA test and then immediately see your genetic connection to all your ancestors? That day isn’t here quite yet, but testing your autosomal DNA is a step in the right direction. Over the course of this chapter, we look at the various uses of autosomal DNA (atDNA) and check out some of the utilities that can help you sort out the pieces of the puzzle that is autosomal DNA.

But First a Quick Review

You might remember from Chapter 10 (if not, feel free to flip back there for a quick look), that humans have 23 pairs of chromosomes. One pair of those chromosomes are the sex chromosomes (X and Y chromosomes). The remaining 22 pairs are referred to as autosomal chromosomes. Autosomal chromosomes are inherited from your parents — one chromosome in each pair from your father and one from your mother. As you are inheriting only one chromosome in each pair from each parent, you are inheriting about half of your parent’s DNA. As you go back further in time, each successive generation ...

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