Book summary - chromosomal abnormalities and structural variants
4 important questions on Book summary - chromosomal abnormalities and structural variants
How can you synchronize cells?
Comparative genomic hybridization (CGH)?
- a technique that uses three sets of DNA: test DNA, normal control DNA and collection of known and characterized DNA fragments immobilized on a microarray. So you can see deletions or duplications.
- Mixed colours mean there same amount of red and green.
- If you see the colour of the control DNA you can say that it is not present in the patient and there is a deletion.
- The results you get is a copy number map
SNP chip/array?
DNA. Deletions and duplications are identified by the differing intensity of hybridization,
compared to probes from normal diploid sequences.
- Can detect of the copy is neutral or not
- A miccroarray carrying allele-specific oligonucleotides for genotyping many SNPs in a single operation
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Two categories of chromosomal abnormalities?
- numerical (so number of chromosomes)
- structural (mutations).
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