"DNA 101" as it applies to y-chromosome testing and genealogy, courtsey of Blair DNA Project

Solving the Mystery: DNA Tests for Your Research: by Donn Devine at Ancestry.com

How Scientists Decode DNA: Introduction

Genetics and Genealogy: Kevin F. Duerincy, Esq.

How is the DNA Organized Into Chromosomes?: The National Fragile X Foundation

Jefferson-Hemings DNA Testing: An On-Line Resource: The Plantation

In Search of Jesse James: Jesse's DNA

National Human Genome Research Institute's (NHGRI): Research

What can our chromosomes tell us?: Chromosomes

Chris Pomery's DNA Portal: DNA & the Family Historian

Y-STR Loci Allele Frequencies: As Reported in the Y-STR European and USA Databases

Time to Most Recent Common Ancestry Calculator: MRCA Calculator

Understanding Mutational Probabilities of a Know Common Ancestor: Mutational Calculator