BCG BCG DNA & Genetic Genealogy

Question 1

Which type of DNA test is most useful for tracing a direct paternal line in genealogical research?

Accepted Answer

Y-DNA

Answer

Y-DNA is passed almost unchanged from father to son, making it ideal for tracing direct paternal lineage.

Question 2

What does the term 'segment triangulation' refer to in genetic genealogy?

Accepted Answer

Confirming that three or more matches share identical DNA segments on the same chromosome region from a common ancestor

Answer

Segment triangulation confirms a shared DNA segment among three or more testers traces back to the same ancestral source.

Question 3

Which BCG standard requires that DNA evidence be corroborated by documentary evidence when making identity claims?

Accepted Answer

The Genealogical Proof Standard

Answer

The Genealogical Proof Standard requires that all evidence, including DNA, be corroborated and conflicts resolved before conclusions are accepted.

Question 4

What is a 'centimorgan' (cM) used to measure in genetic genealogy?

Accepted Answer

The length of shared DNA segments between two individuals

Answer

A centimorgan measures the length of shared DNA segments, with higher values generally indicating a closer relationship.

Question 5

Which DNA testing company database is the largest, providing the most matches for genealogical research as of recent years?

Accepted Answer

AncestryDNA

Answer

AncestryDNA has the largest consumer DNA database, offering the greatest number of potential matches for genealogical research.

(BCG) Board for the Certification of Genealogists Practice Test