CGL Genetic Genealogy 2

Question 1

What is 'chromosome painting' in genetic genealogy?

Accepted Answer

A visual representation showing which ancestral populations or ancestors contributed to specific chromosome segments

Answer

A technique to identify mutations in specific chromosomes

Answer

A method for comparing ethnicity compositions between relatives

Answer

A process for identifying recombination hotspots

Question 2

If two of your DNA matches share DNA with you but do not share DNA with each other, what does this most likely indicate?

Accepted Answer

They are on opposite sides of your family (maternal vs. paternal)

Answer

They are on the same side of your family

Answer

Both matches are false positives

Answer

There is a testing error in the database

Question 3

What is 'triangulation' in genetic genealogy?

Accepted Answer

Confirming a segment is IBD when three or more matches share it at the same chromosomal location with each other

Answer

Testing three generations of a family to build a pedigree

Answer

Using three different DNA testing companies to verify results

Answer

A technique for resolving conflicting documentary and DNA evidence

Question 4

What does 'phasing' refer to in DNA analysis?

Accepted Answer

Separating an individual's maternal and paternal chromosomal contributions

Answer

Converting raw DNA data into a usable file format

Answer

Comparing DNA results across different testing platforms

Answer

Identifying recombination events within a family lineage

Question 5

A DNA match shares approximately 1,800 cM with you. Which relationship category does this amount most likely represent?

Accepted Answer

Half-sibling, grandparent, or aunt/uncle

Answer

First cousin

Answer

Second cousin

Answer

Third cousin once removed

Question 6

What is the primary purpose of the 'Shared Matches' or 'In Common With' feature available on DNA testing platforms?

Accepted Answer

To identify which of your matches are also matched to a specific relative, helping assign them to a family branch

Answer

To find people who share the same surname in their family tree

Answer

To compare ethnicity estimates between two users

Answer

To track family tree connections across multiple databases simultaneously

Question 7

Which type of DNA is most useful for tracing a direct matrilineal line (mother's mother's mother's...)?

Accepted Answer

Mitochondrial DNA (mtDNA)

Answer

Y-DNA

Answer

Autosomal DNA (atDNA)

Answer

X-DNA