CGL Genetic Genealogy

Question 1

Which type of DNA test traces direct patrilineal ancestry by following the Y chromosome?

Accepted Answer

Y-DNA test

Answer

Y-DNA is passed from father to son with minimal change across generations, making it ideal for tracing the direct patrilineal line.

Question 2

What unit is used to measure the length of shared DNA segments between two individuals in genetic genealogy?

Accepted Answer

Centimorgans (cM)

Answer

Centimorgans (cM) measure the genetic distance of shared DNA segments and are used to estimate the relationship between two individuals.

Question 3

Which DNA test is most useful for finding relatives across ALL ancestral lines within approximately 5–6 generations?

Accepted Answer

Autosomal DNA (atDNA)

Answer

Autosomal DNA (atDNA) tests all 22 pairs of autosomes and can detect relatives from every branch of the family tree, typically within 5–6 generations.

Question 4

What does 'endogamy' mean in the context of genetic genealogy?

Accepted Answer

The practice of marrying within a small community, causing elevated DNA sharing among members

Answer

Endogamy refers to communities where people consistently marry within the same group, leading to higher-than-expected DNA sharing that can make relationship predictions less precise.

Question 5

What does the acronym 'IBD' stand for in genetic genealogy?

Accepted Answer

Identical By Descent

Answer

IBD stands for Identical By Descent, meaning the shared DNA segment was inherited from a common ancestor rather than appearing identical by chance.

(CGL) Certified Genealogical Lecturer Practice Test

(CGL) Certified Genealogical Lecturer Practice Test

CGL Genetic Genealogy