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Genomics

Genomics

Genomics is the science of genomes: it is the study of all the genetic material of an organism. In humans, the genome consists of information carried in 23 pairs of chromosomes in the nucleus, as well as mitochondrial DNA. In genomics, both coding and non-coding DNA is sequenced and analyzed. Genomics allows a better understanding of all living things, their evolution, and their diversity. It has a myriad of uses: for example, to build phylogenetic trees, to improve productivity and...

Next-generation Sequencing

Next-generation Sequencing

The first human genome sequencing project cost $2.7 billion and was declared complete in 2003, after 15 years of international cooperation and collaboration between several research teams and funding agencies. Today, with the advent of next-generation sequencing technologies, the cost and time of sequencing a human genome have dropped over 100 fold.
Next-Generation Sequencing Methods
Although all next-generation methods use different technologies, they all share a set of standard features....

Genome Annotation and Assembly

Genome Annotation and Assembly

The genome refers to all of the genetic material in an organism. It can range from a few million base pairs in microbial cells to several billion base pairs in many eukaryotic organisms. Genome assembly refers to the process of taking the DNA sequencing data and putting it all back together in a correct order to create a close representation of the original genome. This is followed by the identification of functional elements on the newly assembled genome, a process called genome annotation.

Multi-species Conserved Sequences

Multi-species Conserved Sequences

Next-generation sequencing technologies have created large genomic databases of a variety of animals and plants. Ever since the human genome project was completed, scientists studied the genome of primates, mammals, and other phylogenetically distant living beings. Such large-scale studies have provided new insights into the evolutionary relationship between organisms.
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Sanger Sequencing

Sanger Sequencing

DNA sequencing is a fundamental technique that is routinely used in the biological sciences. This method can be applied to a range of questions at different scales - from the sequencing of a cloned DNA fragment or the study of a mutation in a gene up to whole-genome sequencing. However, despite the widespread use of sequencing today, it was not until 1977 that Fredrick Sanger and his collaborators developed the chain-termination method to decode DNA sequences. It relies on the separation of a...

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Related Experiment Video

Updated: Sep 28, 2025

Ultra-long Read Sequencing for Whole Genomic DNA Analysis

Ultra-long Read Sequencing for Whole Genomic DNA Analysis

Published on: March 15, 2019

The complete sequence of a human genome.

Sergey Nurk¹, Sergey Koren¹, Arang Rhie¹

¹Genome Informatics Section, Computational and Statistical Genomics Branch, National Human Genome Research Institute, National Institutes of Health, Bethesda, MD, USA.

Science (New York, N.Y.)

|March 31, 2022

Summary

The Telomere-to-Telomere (T2T) Consortium has completed the human genome sequence, adding 200 million base pairs of previously missing heterochromatic regions. This breakthrough provides a fully gapless reference genome for comprehensive genetic research.

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Last Updated: Sep 28, 2025

Ultra-long Read Sequencing for Whole Genomic DNA Analysis

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Published on: March 15, 2019

Transcriptomic Analysis of C. elegans RNA Sequencing Data Through the Tuxedo Suite on the Galaxy Project

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Novel Sequence Discovery by Subtractive Genomics

Novel Sequence Discovery by Subtractive Genomics

Published on: January 25, 2019

Area of Science:

Genomics
Molecular Biology
Genetics

Background:

The initial human reference genome (released in 2000) was incomplete, omitting crucial heterochromatic regions.
These heterochromatic regions constitute approximately 8% of the genome and contain complex, repetitive sequences.

Purpose of the Study:

To generate a complete, gapless sequence of the human genome, including previously unassembled heterochromatic regions.
To correct errors in existing reference genomes and improve the accuracy of gene predictions.

Main Methods:

Utilized advanced sequencing technologies and bioinformatics approaches to assemble the remaining 8% of the human genome.
Focused on gapless assembly of all chromosomes, including challenging centromeric and pericentromeric regions.

Main Results:

Announced the T2T-CHM13, a complete 3.055 billion base pair human genome sequence with gapless assemblies for all chromosomes except Y.
Added nearly 200 million base pairs of novel sequence, including 1956 gene predictions (99 protein-coding).
Successfully sequenced complex regions like centromeric satellite arrays and segmental duplications.

Conclusions:

The T2T-CHM13 reference genome provides an unprecedented resource for understanding genome structure and function.
Enables detailed variational and functional studies in previously inaccessible genomic regions.
Represents a significant advancement in genomics, paving the way for future research.