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Related Concept Videos

Genome Size and the Evolution of New Genes03:21

Genome Size and the Evolution of New Genes

While every living organism has a genome of some kind (be it RNA, or DNA), there is considerable variation in the sizes of these blueprints. One major factor that impacts genome size is whether the organism is prokaryotic or eukaryotic. In prokaryotes, the genome contains little to no non-coding sequence, such that genes are tightly clustered in groups or operons sequentially along the chromosome. Conversely, the genes in eukaryotes are punctuated by long stretches of non-coding sequence.
Genome Size and the Evolution of New Genes03:21

Genome Size and the Evolution of New Genes

While every living organism has a genome of some kind (be it RNA, or DNA), there is considerable variation in the sizes of these blueprints. One major factor that impacts genome size is whether the organism is prokaryotic or eukaryotic. In prokaryotes, the genome contains little to no non-coding sequence, such that genes are tightly clustered in groups or operons sequentially along the chromosome. Conversely, the genes in eukaryotes are punctuated by long stretches of non-coding sequence.
Human Genetics01:28

Human Genetics

Human genetics provides a profound framework for understanding the interplay between genetic predispositions and human psychology. At the heart of this discipline lies the study of how genes influence physical traits, behaviors, and susceptibility to diseases. Each person carries a unique genetic code that subtly or significantly shapes their psychological and behavioral landscape.
The complex relationship between genetics and psychology is observable through common biological components such...
Gene Duplication and Divergence02:37

Gene Duplication and Divergence

The seminal work of Ohno in 1970 popularized the idea of gene duplication and divergence. DNA sequence comparison studies reveal that a large portion of the genes in bacteria, archaebacteria, and eukaryotes was  generated by gene duplication and divergence, indicating its critical role in evolution.
The duplicated copies of the gene are called Paralogs. Paralogs with similar sequences and functions form a gene family. Across several species, a large number of gene families are characterized.
Chromosome Duplication02:05

Chromosome Duplication

The process of chromosome duplication during cell division requires genome-wide disruption and re-assembly of chromatin. The chromatin structure must be accurately inherited, reassembled, and maintained in the daughter cells to ensure lineage propagation.
The basic unit of the chromatin is the nucleosome, consisting of DNA wrapped around octameric histone proteins and short stretches of linker DNA separating individual nucleosomes. The histone proteins within the nucleosome have their...
Gene Conversion02:08

Gene Conversion

Other than maintaining genome stability via DNA repair, homologous recombination plays an important role in diversifying the genome. In fact, the recombination of sequences forms the molecular basis of genomic evolution. Random and non-random permutations of genomic sequences create a library of new amalgamated sequences. These newly formed genomes can determine the fitness and survival of cells. In bacteria, homologous and non-homologous types of recombination lead to the evolution of new...

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Related Experiment Video

Updated: May 10, 2026

Hi-C: A Method to Study the Three-dimensional Architecture of Genomes.
22:27

Hi-C: A Method to Study the Three-dimensional Architecture of Genomes.

Published on: May 6, 2010

The human genome contracts again.

Dmitri S Pavlichin1, Tsachy Weissman, Golan Yona

  • 1Department of Physics and Department of Electrical Engineering, Stanford University, CA 94305, USA.

Bioinformatics (Oxford, England)
|June 25, 2013
PubMed
Summary
This summary is machine-generated.

Efficient genome compression is crucial as human genome sequencing grows. This study introduces a novel entropy coding method using reference genomes and SNPs, significantly reducing data size for genomic analysis.

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Area of Science:

  • Genomics
  • Bioinformatics
  • Data Compression

Background:

  • Rapid increase in human genome sequencing generates massive datasets.
  • Storing and transferring complete genomes poses significant challenges for analysis.
  • Efficient data compression is essential for future genomic research.

Purpose of the Study:

  • To develop an efficient technique for compressing human genome data.
  • To address the storage and transfer limitations hindering genomic analysis.
  • To improve upon existing genome compression methods.

Main Methods:

  • Utilized entropy coding based on a reference genome.
  • Incorporated known Single Nucleotide Polymorphisms (SNPs) for enhanced compression.
  • Explored intrinsic genomic features and external genomic databases to optimize compression.

Main Results:

  • Compressed James Watson's genome to 2.5 megabytes (MB), a 37% improvement over previous methods.
  • Achieved similar compression ratios for most genomes in the 1000 Genomes Project.
  • Demonstrated the effectiveness of biologically inspired compression techniques.

Conclusions:

  • The developed technique offers significant data reduction for human genomes.
  • This approach is promising for compressing genomes of lower organisms and future human datasets.
  • Efficient genome compression is vital for advancing large-scale genomic studies.