Related Experiment Video
Updated: May 29, 2026
16:37
Technical Demonstration of Whole Genome Array Comparative Genomic Hybridization
Published on: August 5, 2008
Molecular karyotyping: from microscope to SNP arrays
Antoinet C J Gijsbers1, Claudia A L Ruivenkamp
1Clinical Genetics, Leiden University Medical Center, The Netherlands.
Hormone Research in Paediatrics
|August 26, 2011
Summary
High-resolution molecular karyotyping detects chromosomal aberrations missed by conventional methods. This advanced technique identifies new microdeletion and microduplication syndromes, improving diagnostic capabilities.
Area of Science:
- Genetics
- Molecular Biology
- Clinical Cytogenetics
Background:
- Chromosomal rearrangements cause distinct clinical phenotypes.
- Conventional karyotyping has limitations in resolution (5-10 Mb).
- Molecular cytogenetics has advanced diagnostic capabilities.
Purpose of the Study:
- To review commonly used molecular and conventional cytogenetic techniques.
- To highlight advancements in high-resolution whole-genome array techniques.
- To discuss the impact of molecular karyotyping on identifying new genetic syndromes.
Main Methods:
- Review of conventional karyotyping.
- Focus on high-resolution whole-genome array techniques (molecular karyotyping).
- Comparison of resolution and diagnostic capabilities.
Main Results:
- Molecular karyotyping offers higher resolution than conventional methods.
- New microdeletion and microduplication syndromes have been identified.
- Advanced techniques are crucial for detecting sub-microscopic chromosomal aberrations.
Conclusions:
- Molecular karyotyping is a powerful tool for detecting chromosomal aberrations.
- High-resolution techniques have expanded the understanding of genetic syndromes.
- These advancements significantly improve clinical diagnostics.
Related Concept Videos
01:17Karyotyping
Overview
01:17Karyotyping
Overview
02:34DNA Microarrays
Microarrays are high-throughput and relatively inexpensive assays that can be automated to analyze large quantities of data at a time. They are used in genome-wide studies to compare gene or protein expression under two varied conditions, such as healthy and diseased states. Microarrays consist of glass or silica slides on which probe molecules are covalently attached through surface functionalization. Most commonly, the slides are prepared through the chemisorption of silanes to silica...
01:29Modern Molecular Taxonomy
Advancements in molecular biology have revolutionized the identification and characterization of bacteria, with multiple methods leveraging DNA sequencing for enhanced precision. As sequencing technologies improve and costs decline, these approaches are increasingly used in clinical, environmental, and evolutionary studies.Multilocus Sequence Typing (MLST) examines several housekeeping genes, essential chromosomal genes encoding cellular functions, to distinguish strains. Approximately...
02:26Comparing Copy Number Variations and SNPs
Sequencing of the human genome has opened up several best-kept secrets of the genome. Scientists have identified thousands of genome variations that exist within a population. These variations can be a single nucleotide or a larger chromosomal variation.
Copy number variations or CNVs are the structural variations that cover more than 1kb of DNA sequence. The single nucleotide polymorphism (SNP), on the other hand, is a single nucleotide change or a point mutation that is found in more than 1%...
Copy number variations or CNVs are the structural variations that cover more than 1kb of DNA sequence. The single nucleotide polymorphism (SNP), on the other hand, is a single nucleotide change or a point mutation that is found in more than 1%...