Chap 18 Flashcards
The genetic of Identity
1
Q
Common markers used to identify individuals
A
- Single nucleotide polymorphisms (SNPs)
- Short tandem repeats (STRs)
2
Q
CODIS
A
20 STRs on haploid chromosome
40 data points for a person
3
Q
Variable number of
STR loci
A
Different numbers of repeats at these loci.
4
Q
Limitations of Forensic DNA Evidence
A
- Require DNA from a crime scene
- Background DNA
- Touch DNA
- Cross-contaminated in the lab
5
Q
Haplogroup
A
- A group of similar haplotypes that share a common ancestor with specific genetic mutation
6
Q
Mitochondrial Haplogroups
A
- From mother (maternal)
- L: Africa
- L3: E Africa
- N, R: SW Asia
- U: Eu
- K: Middle East
7
Q
Y Chromosome Haplogroup
A
- From father
8
Q
Genetic genealogy
A
- The use of DNA testing in combination with genealogical to trace family lineages, discover ancestral origins and build family trees.
9
Q
AncestryDNA
A
- Associating SNP profiles with reported
family origins to establish 26 reference populations. - Based on 3000 SNP profiles
