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Related Concept Videos

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.
Gene Flow02:39

Gene Flow

Gene flow is the transfer of genes among populations, resulting from either the dispersal of gametes or from the migration of individuals.

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Related Experiment Video

Updated: May 9, 2026

Mapping Mammalian 3D Genome Interactions with Micro-C-XL
11:41

Mapping Mammalian 3D Genome Interactions with Micro-C-XL

Published on: November 3, 2023

Mapping the human reference genome's missing sequence by three-way admixture in Latino genomes.

Giulio Genovese1, Robert E Handsaker, Heng Li

  • 1Stanley Center for Psychiatric Research, Broad Institute of MIT and Harvard, Cambridge, MA 02142, USA. giulio.genovese@gmail.com

American Journal of Human Genetics
|August 13, 2013
PubMed
Summary

Researchers mapped previously inaccessible human genome sequences using ancestry linkage disequilibrium in diverse populations. This approach located nearly 20 megabases of missing euchromatic sequences, improving genome assembly and analysis.

Related Experiment Videos

Last Updated: May 9, 2026

Mapping Mammalian 3D Genome Interactions with Micro-C-XL
11:41

Mapping Mammalian 3D Genome Interactions with Micro-C-XL

Published on: November 3, 2023

Area of Science:

  • Genomics and Bioinformatics
  • Human Genetics
  • Population Genetics

Background:

  • The human genome contains 'inaccessible' regions, often gene-rich euchromatin, that are difficult to map due to isolation by heterochromatin and repetitive sequences.
  • Current human genome references, like NCBI Genome GRCh37, have unlocalized or missing sequences, hindering comprehensive genomic analysis.

Purpose of the Study:

  • To develop and apply a novel method for localizing previously unmapped and inaccessible human genome sequences.
  • To significantly increase the amount of mapped euchromatic sequences within the human genome reference.

Main Methods:

  • Utilized ancestry linkage disequilibrium analysis in populations with multi-continental ancestry, specifically Latino populations.
  • Employed admixture mapping to pinpoint the genomic locations of unlocalized sequences using publicly available whole-genome sequencing data.
  • Focused on sequences originating from fosmids and larger clones.

Main Results:

  • Successfully mapped nearly 20 megabases of sequence that was previously unlocalized or missing from the human genome reference.
  • Demonstrated that most sequences from fosmids and larger clones can be effectively mapped using this admixture mapping approach.
  • Identified gene-rich euchromatic sequences embedded within highly repetitive pericentromeric regions.

Conclusions:

  • Ancestry linkage disequilibrium provides a powerful method for mapping previously inaccessible human genome regions.
  • This approach significantly contributes to filling gaps in the human genome reference, particularly for gene-containing sequences.
  • The findings will inform future genome assembly efforts and the construction of improved human genome references.