DNA for Genealogy
What is DNA? Autosomal DNA Mitochondrial DNA Y-DNA DNA Test Process Y DNA Results DNA Mutations Y-DNA Markers More Y-DNA Markers Y-DNA TMRCA Y-Chromosome SNPs Y-DNA Haplogroups mtDNA interpretation mtDNA Haplogroups DNA Testing Companies DNA Links Y-DNA Markers
Each "rung" on the DNA ladder is called a "nucleotide"
Repeats of nucleotide patterns (e.g. CAGT) are called STRs
The number of STRs at named DNA locations = marker values
Males with similar marker values may have a common ancestor
