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Related Concept Videos

International Nursing Organizations II01:28

International Nursing Organizations II

The World Health Organization (WHO) is a specialized agency of the United Nations based in Geneva. The WHO has many initiatives that center around health. Primarily, they lead global efforts to expand universal health coverage using science-based policies and programs. They are also responsible for shaping health research agendas and developing norms and standards.
The WHO provides expert team support, including funding, vaccines, testing, and treatment tools at the country level to fight...
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,...
Reproductive Cloning01:27

Reproductive Cloning

Reproductive cloning is the process of producing a genetically identical copy—a clone—of an entire organism. While clones can be produced by splitting an early embryo—similar to what happens naturally with identical twins—cloning of adult animals is usually done by a process called somatic cell nuclear transfer (SCNT).
Somatic Cell Nuclear Transfer
In SCNT, an egg cell is taken from an animal and its nucleus is removed, creating an enucleated egg. Then a somatic cell—any cell that is not a sex...
Reproductive Cloning01:27

Reproductive Cloning

Reproductive cloning is the process of producing a genetically identical copy—a clone—of an entire organism. While clones can be produced by splitting an early embryo—similar to what happens naturally with identical twins—cloning of adult animals is usually done by a process called somatic cell nuclear transfer (SCNT).
Somatic Cell Nuclear Transfer
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Non-nuclear Inheritance01:29

Non-nuclear Inheritance

Most DNA resides in the nucleus of a cell. However, some organelles in the cell cytoplasm⁠—such as chloroplasts and mitochondria⁠—also have their own DNA. These organelles replicate their DNA independently of the nuclear DNA of the cell in which they reside. Non-nuclear inheritance describes the inheritance of genes from structures other than the nucleus.
Non-nuclear Inheritance01:29

Non-nuclear Inheritance

Most DNA resides in the nucleus of a cell. However, some organelles in the cell cytoplasm⁠—such as chloroplasts and mitochondria⁠—also have their own DNA. These organelles replicate their DNA independently of the nuclear DNA of the cell in which they reside. Non-nuclear inheritance describes the inheritance of genes from structures other than the nucleus.

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Related Experiment Video

Updated: May 19, 2026

Model Surgical Training: Skills Acquisition in Fetoscopic Laser Photocoagulation of Monochorionic Diamniotic Twin Placenta Using Realistic Simulators
09:51

Model Surgical Training: Skills Acquisition in Fetoscopic Laser Photocoagulation of Monochorionic Diamniotic Twin Placenta Using Realistic Simulators

Published on: March 21, 2018

The Norwegian Twin Registry.

Thomas S Nilsen1, Ingunn Brandt, Per Magnus

  • 1Division of Epidemiology, Norwegian Institute of Public Health, Oslo, Norway.

Twin Research and Human Genetics : the Official Journal of the International Society for Twin Studies
|September 6, 2012
PubMed
Summary

The Norwegian Twin Registry centralizes twin data for research. This valuable resource enhances genetic and health studies through nationwide registry linkages.

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Published on: September 5, 2011

Related Experiment Videos

Last Updated: May 19, 2026

Model Surgical Training: Skills Acquisition in Fetoscopic Laser Photocoagulation of Monochorionic Diamniotic Twin Placenta Using Realistic Simulators
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Model Surgical Training: Skills Acquisition in Fetoscopic Laser Photocoagulation of Monochorionic Diamniotic Twin Placenta Using Realistic Simulators

Published on: March 21, 2018

Guide Wire Assisted Catheterization and Colored Dye Injection for Vascular Mapping of Monochorionic Twin Placentas
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Guide Wire Assisted Catheterization and Colored Dye Injection for Vascular Mapping of Monochorionic Twin Placentas

Published on: September 5, 2011

Area of Science:

  • Epidemiology
  • Genetics
  • Public Health

Background:

  • Norway possesses a rich history of twin research, but data were fragmented and inaccessible.
  • Lack of central coordination hindered scientific community access to valuable twin datasets.

Purpose of the Study:

  • To establish a unified research resource for Norwegian twin data.
  • To consolidate and facilitate access to twin data for scientific inquiry.

Main Methods:

  • The Norwegian Twin Registry was established in 2009 at the Norwegian Institute of Public Health.
  • Data collection encompasses twins born between 1895-1960 and 1967-1979, with ongoing additions.
  • DNA banking and linkage with national health, demographic, and socioeconomic registries are key components.

Main Results:

  • The registry currently holds 47,989 twins, with 31,440 providing consent for health research.
  • Approximately 4,800 twins have DNA samples banked at the Norwegian Institute of Public Health biobank.
  • The registry's value is amplified by its linkage capabilities with extensive Norwegian nationwide registries.

Conclusions:

  • The Norwegian Twin Registry provides a centralized, accessible, and comprehensive resource for twin research.
  • The registry significantly enhances opportunities for genetic, epidemiological, and public health research in Norway.
  • Integration with nationwide registries offers unparalleled potential for in-depth analysis of health and socioeconomic factors.