Allelic differences
are due to single SNPs
ASOs are
SNP-specific probes
"Southern Blot" test
without electrophoresis, probe "sticks" to only one allele:
genetic
screen is "positive or
negative" result
Ex.: 508-ASO
Test for Cystic Fibrosis
probes deletion mutation (OMIM219700)
Pre-Natal Screening:
the GATACCA model
Ex.: Mr. & Ms. Mus seek
genetic counselling ....
See also Species-Specific Oligonucleotides (SSOs)
Quantitative "Real-Time" PCR assays (RT-PCR)
DNA Fingerprinting
Determination of an individual-specific
genetic patterns
Variable Number of Tandem Repeat (VNTR) loci
Microsatellites
- di-, tri-, tetra-nucleotide motifs repeated 101s ~ 106s of times
(CACACACACACA
versus CACACACA) [IG1 21.02]
Origin by slipped-mismatch replication
Copy number
mutates rapidly, even between parents & children
VNTR loci are highly polymorphic [HOMEWORK]
[IG1 21.03]
good
marker for within-population studies [IG1 21.05]
[Animation of DNA
Fingerprinting for forensics
]
Forensics - use of DNA
data as legal evidence [IG1 21.04]
Positive
dentification of individuals [HOMEWORK] with high
probability [IG1 21.06] [IG1 19.12]
"Variant Detector Arrays (VDAs)" detect specific SNP alleles in genome
"GeneChips" perform automated "Northern"
analysis:
specific mRNAs or cDNAs
are detected in proteome
"pseudo-colours" indicate levels
of gene expression
DNA "re-sequencing
arrays" sequence of 30~500 Kbp in one experiment
Transgenic organisms
Genomics: the genetic
study of entire genomes
NADH2 sequence
identified from GenBank
All text material ©2012 by Steven M. Carr