Thanks for your question.
If you haven’t had a chance to look at our FAQ What to Expect from Your Dog’s Results https://darwinsark.org/faqs/#section-what-to-expect-from-your-dogs-results it has some good information about the breeds in our panel as well as how many markers.
In addition our own Dr. Hekman was interviewed for this article, which might be of interest if you’re looking for more general information about breed testing. I’d maybe set aside the headline and ranking, and look at the information contained in the article. https://www.nytimes.com/wirecutter/reviews/best-dog-dna-test/
Finally our blog (stories) has a lot of great information. https://darwinsark.org/stories/
This article on how we get information from DNA is a good starting point if you’re interested in learning more about the process. https://darwinsark.org/information-from-dna/
I hope that helps!
(filling in for Brittney)