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A genealogical DNA test examines the nucleotides
at specific locations on a person's DNA for genetic genealogy
purposes. The test results are meant to have no informative
medical value and do not determine specific genetic diseases or
disorders (see possible exceptions in Medical information
below); they are intended only to give genealogical information.
Genealogical DNA tests generally involve comparing the results
of living individuals as opposed to obtaining samples from
deceased people.
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Y chromosome (Y-DNA) testing
A man's paternal ancestry can be traced using the
DNA on his Y chromosome (Y-DNA) through Y-STR
Testing. This is useful because the Y chromosome,
like many European surnames, passes from father to
son, and can be used to help study surnames. Women
who wish to determine their paternal ancestry can
ask their father, brother, paternal uncle,
paternal grandfather, or a cousin who shares the
same paternal lineage to take a test for them. |
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Genetic fingerprinting
Genetic fingerprinting (also called DNA testing,
DNA typing, or DNA profiling) is a technique used
to distinguish between individuals of the same
species using only samples of their DNA. Although
two individuals will have the vast majority of
their DNA sequence in common, DNA profiling
exploits highly variable repeat sequences called
Variable Number Tandem Repeats (VNTRs). These loci
are variable enough that two unrelated humans are
unlikely to have the same alleles. |
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Haplotype
A Y-DNA haplotype is the numbered results of a
genealogical Y-DNA test. Each allele value has a
distinctive frequency within a population. For
example, at DYS455, the results will show 8, 9,
10, 11 or 12 repeats, with 11 being most common.
For high marker tests the allele frequencies
provide a signature for a surname lineage. |
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DNA Identification and Verification
The DNA Identity Testing Center also provides genetic profiling via our SAFEDNATM ID card. Your SAFEDNA ID card will provide positive identification and may be used to ensure child safety, prevent fraud and protect assets. To inquire about SAFEDNATM, call toll free 800-DNA-EXAM, 888-R-U-MYDAD or write to us at DNAtest@800dnaexam.com |
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Expert Witness Program
Our highly credentialed experts consistently deliver objective independent testimony, authoritative studies, and advisory services for DNA and forensic testing and analysis. Call 800-DNA-EXAM, 888-R-U-MYDAD or write to us at DNAtest@800dnaexam.com |
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