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Related Concept Videos

Comparing Copy Number Variations and SNPs02:26

Comparing 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%...
Single Nucleotide Polymorphisms-SNPs01:05

Single Nucleotide Polymorphisms-SNPs

A single nucleotide polymorphism or SNP is a single nucleotide variation at a specific genomic position in a large population. It is the most prevalent type of sequence variation found in the human genome. Point mutations that occur in more than 1% of the population qualify as SNPs. These are present once every 1000 nucleotides on an average in the human genome. Replacement of a purine with another purine (A/G) or a pyrimidine with another pyrimidine (C/T) is known as a transition. In contrast,...
Karyotyping01:17

Karyotyping

Describing the number and physical features of chromosomes can reveal abnormalities that underlie genetic diseases. This description is facilitated by special staining techniques that produce a particular banding pattern on each chromosome. State-of-the-art techniques make this approach even more powerful, enabling the detection of individual genes that cause disease.A Simple Chromosome Staining Technique Provides Valuable Scientific InsightSome genetic diseases can be detected by looking at...
Genetic Variation01:25

Genetic Variation

Genetic variation is the diversity in DNA sequences found among individuals of the same species. This diversity is crucial for a species' survival because it helps organisms adapt to environmental changes. Genetic variation begins with fertilization, where an egg and sperm cell merge. Each of these cells carries 23 chromosomes, up to 46 in the fertilized egg. Chromosomes are long DNA strands that contain genes, the basic units of heredity.
Genes exist in different versions called alleles, which...
Principles of Pharmacogenetics: Types of Genetic Variants01:27

Principles of Pharmacogenetics: Types of Genetic Variants

The human genome is over 99.9% identical between individuals, yet genetic differences exist at millions of bases. The human genome contains approximately 3 million variant positions per individual, many of which are heterozygous, contributing to genetic diversity and individual traits. Genetic variations include single-nucleotide polymorphisms (SNPs), insertions, deletions, and copy number variations (CNVs).SNPs, the most common variation, involve single-base changes in DNA. These can be...
Histone Variants at the Centromere02:30

Histone Variants at the Centromere

Histone variants are the histone proteins with structural and sequence variations. These variants may be regarded as “mutant” forms that replace their canonical histone counterparts in the nucleosomes. Specific post-translational modifications on the histone variants enable further chromatin complexity and regulate tissue-specific gene expression. The most common histone variants are from histone H2A, H2B, and linker histone H1 families. However, several variants of histone H3 variants are also...

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Related Experiment Video

Updated: Jun 13, 2026

Detection of Copy Number Alterations Using Single Cell Sequencing
09:45

Detection of Copy Number Alterations Using Single Cell Sequencing

Published on: February 17, 2017

Copy number variation and human genome maps.

Steven A McCarroll1

  • 1Department of Genetics, Harvard Medical School, Boston, Massachusetts, USA. mccarroll@genetics.med.harvard.edu

Nature Genetics
|April 30, 2010
PubMed
Summary
This summary is machine-generated.

New human genome maps detail copy number variations (CNVs) to advance complex disease genetics research. These high-resolution maps link genetic variations to human phenotypic traits.

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Area of Science:

  • Genomics
  • Human Genetics
  • Complex Disease Research

Background:

  • Human genome mapping is crucial for understanding genetic contributions to diseases.
  • Copy Number Variations (CNVs) are significant sources of genetic diversity and disease risk.
  • Previous CNV maps provided a foundational resource, but higher resolution is needed.

Discussion:

  • Four recent studies have significantly enhanced the resolution of human genome CNV maps.
  • These advanced maps are instrumental in identifying the genetic underpinnings of complex diseases.
  • Researchers are actively correlating specific CNV patterns with observable human phenotypic variation.

Key Insights:

  • Improved CNV mapping provides unprecedented detail of genomic structural variation.
  • The studies successfully link high-resolution CNV data to specific human traits and disease susceptibilities.
  • This work represents a significant step forward in precision medicine and genetic diagnostics.

Outlook:

  • Future research will leverage these refined CNV maps for more accurate disease prediction and personalized treatments.
  • Continued integration of CNV data with phenomic information will deepen our understanding of genotype-phenotype relationships.
  • These resources are expected to accelerate the discovery of novel therapeutic targets for complex genetic disorders.