Explanation found for the first time for the origin of identical twins

Source link

An international group of researchers has for the first time found a biological explanation for the origin of identical twins. The group discovered that it is not the DNA of identical twins that they should look for, but a certain substance that attaches itself to the DNA. The discovery is also important for research into birth defects.

Biological psychologist Jenny van Dongen and professor Dorret Boomsma of the VU University Amsterdam led the research. The results were published today in the scientific journal Nature Communications. “This is a very big discovery,” says Boomsma. “The origin and birth of identical twins has always been a complete mystery.”

6000 twins

For the study, the scientists looked at the DNA of more than 6,000 twins. Twin registries from the Netherlands, Great Britain, Finland and Australia participated in the study.

Identical twins arise from a single fertilized egg that splits in two. Fraternal twins develop from two fertilized eggs.

‘Flags’ on DNA

The researchers found that the DNA of identical twins is ‘packaged’ differently than that of other people. In hundreds of places, a kind of flag hangs on the DNA, as it were. “If you look at what is attached to the DNA, the technical term is a methyl group, it turns out that in more than 800 places in the DNA the methylation is different in identical twins than in the rest of the population,” said Boomsma in News and Co on NPO Radio 1.

According to Boomsma, this process probably starts very early after conception. In total, there are 834 locations in the DNA where the level of methylation in identical twins is different than in other people.

Birth defects

“A very important observation is that in certain congenital disorders, which are often very serious abnormalities, identical twins are strongly overrepresented,” says Boomsma. “With our results, you can look back into people’s lives, because it’s such an early fingerprint, and see if anyone might have ever been part of identical twins.”

The results can be used to determine whether a person has lost an identical twin brother or sister early in the pregnancy, also known as the vanishing twin syndrome called. “That can happen very early in the pregnancy. So early that the mother doesn’t even notice.” That way, the results can help to better understand why someone has a birth defect.

Explanation found for the first time for the origin of identical twins
Source link Explanation found for the first time for the origin of identical twins

Internet Explorer Channel Network
News Related


Haitink, ‘the enigmatic maestro', was one of the world's greatest conductors

‘Dirigieren ist ein Rätsel’, conducting is a mystery, is the title of the biography that appeared about Bernard Haitink, when he retired as conductor in 2019. A year later, a ... Read more »

Internet sales no longer grow through the roof

It is certainly still double digits, but a record growth like the one at the beginning of this year was no longer possible for European webshops during the second quarter. ... Read more »

Police arrest at least sixty German football fans in Rotterdam

According to a police spokesperson, the group was out for a confrontation with Feyenoord fans. “The fans had all kinds of stuff with them that indicated that they wanted to ... Read more »

‘Set maximum number of ICU beds for covid patients'

Now that the infections are rising again quickly, the old specter of full ICs is also looming. If it is up to Armand Girbes, intensivist at Amsterdam UMC, we can ... Read more »

Vandebron will raise energy prices from next month

Energy company Vandebron will increase the energy prices for customers with a variable contract as of 1 November. The company had previously announced that prices would go up on January ... Read more »

Update: 3rd suspect arrested in investigation of body Distelweg

Two previous arrests The police arrested two suspects on October 18 and 19 following a large-scale investigation. These two suspects have been arrested on suspicion of manslaughter or murder. Fire ... Read more »

Morocco gives permission for repatriation flights to the Netherlands

The Moroccan government gives permission for multiple flights to repatriate stranded Dutch people. This is reported by the Ministry of Foreign Affairs. Since last night, a flight ban has been ... Read more »

Europe buys time to resolve Polish conflict

Poland and the rest of Europe need more time to resolve their raging fight over the Polish rule of law. The rest of Europe can afford that because 36 billion ... Read more »

OM wants jail time for “very sneaky” fraud with covid protective equipment

‘Professional website’ “At the height of a pandemic, when there was an unprecedented shortage of covid protective equipment and people really saw no other option but to rely on a ... Read more »

Fans Union Berlin arrested in Rotterdam, ‘wanted confrontation with Feyenoord fans'

About sixty football fans of Union Berlin were arrested in Rotterdam tonight. According to the police, they were out for a confrontation with Feyenoord supporters in the Lombardijen district. The ... Read more »

Group of 60 Union Berlin fans arrested in Rotterdam

Photo: ANP The police have arrested a group of about sixty German fans in the Rotterdam district of Lombardijen before Feyenoord’s home match against FC Union Berlin. According to a ... Read more »

‘Man who killed British MP had been planning for two years'

That said the public prosecutor today at the arraignment of the suspect who sees himself as a supporter of Islamic State. According to the prosecutor, Ali Harbi Ali had “religious ... Read more »

OM investigation: 15-year-old boy pushed 39-year-old victim under tram

pushed “At the moment, the investigation shows that the 39-year-old victim visited the three arrested boys several times. In the end, the 15-year-old pushed the 39-year-old victim. The man fell, ... Read more »

Navalni grateful for European Parliament human rights prize

Navalni’s team has posted its response on Twitter. ‘I am very grateful to the European Parliament for appreciating our work.’ The Russian dedicates his prize to ‘all people who fight ... Read more »

Response of the Ministry of Economic Affairs to the hydrogen story of Nieuwsuur

This is the extensive response of the Ministry of Economic Affairs and Climate Policy to Nieuwsuur’s story about the billions of investments in hydrogen. You can read that news article ... Read more »

Injured in collision in Sint-Michielsgestel

Sint-Michielsgestel The emergency services turned out en masse on Thursday afternoon around 5.25 pm for a unilateral traffic accident on Hemelrijkstraat in Sint-Michielsgestel. An emergency helicopter that had been alerted ... Read more »

The Dutch Wanda lost her four children: ‘I am so sorry that they grew up separately'

The Dutch allowance affair continues to cause commotion as it appears that 1,115 children were taken from their parents between 2015 and 2020 after the tax authorities falsely accused them ... Read more »

Gasunie warns of risks of billions of hydrogen investments

The Dutch government and the business community want to invest billions in the green hydrogen economy announced by the cabinet. State company Gasunie now warns against risks that remain unaddressed ... Read more »

Another two members of the Last Will Cooperative arrested

Two more members of the Last Will Cooperative were arrested this week in an investigation into assisted suicide. It concerns a 72-year-old woman from Amersfoort and a 78-year-old man from ... Read more »

Man arrested for sexual innuendo of young girls

The suspect pretended to be someone else online, via social media, and approached the girls with sexual innuendo. The suspect ran into the light because one of his victims realized ... Read more »

Call: What do you want to know about actor Marouane Meftah?

We will soon visit actor Marouane Meftah. He is best known for his role as Zakaria in the Mocro Mafia series and he plays in the new children’s film Captain ... Read more »

Fifteen-year-old boy suspected of manslaughter (39) in tram drama in The Hague: ‘Deliberately pushed'

A 15-year-old boy who pushed a Polish man in front of the tram in The Hague on Monday evening is charged with manslaughter. That will be announced by the Public ... Read more »

Vikings were too quick for Columbus: they settled in America exactly a thousand years ago

The Vikings were about five hundred years ahead of him. Legends tell of their crossing from Greenland and remains of a settlement have been found in Newfoundland. But when exactly ... Read more »

Dutch researchers show that Vikings were already in America in the year 1021

“There is a site in Newfoundland that we already knew that Vikings had been there,” says Margot Kuitems, researcher from the University of Groningen (RUG). “Probably these explorers sailed west ... Read more »

More arrests in assisted suicide investigation

Two more people have been arrested in the criminal investigation into assisted suicide. It concerns a 72-year-old woman from Amersfoort and a 78-year-old man from Den Bosch, the Public Prosecution ... Read more »

15-year-old boy suspected of pushing man in front of a tram in The Hague

A 15-year-old boy from The Hague is suspected of manslaughter because, according to the Public Prosecution Service, he pushed a man in front of the tram in the Ypenburg district ... Read more »

Dino ‘Big John' sold for 5.5 million

The skeleton of a large dinosaur has been sold in Paris for 5.5 million euros. The skeleton is called Big John and it is a triceratops, one of the most ... Read more »

‘Un monde' by Laura Wandel is Belgian entry for Oscars

‘Un monde’, released in English as ‘Playground’, tells the story of Nora and her big brother Abel. When Nora goes to first grade, she sees her big brother Abel being ... Read more »

Arrest in 2010 in which firefighter died

In the early morning of March 8, 2010, a fire broke out at a Scheer & Foppen building on Kerkstraat in Veendam. 44-year-old firefighter Wiebe de Vries of the Veendam ... Read more »

Rutte: ‘exactly sort out' out-of-home placement for child allowances

Prime Minister Rutte wants to find out exactly what the situation is with the out-of-home placement of more than a thousand children of victims of the allowance affair. He responds ... Read more »

Number of dog-related fines decreased by 70%

Most fines in large cities and coastal municipalities Especially in large cities, where it is not easy to move to a place outside built-up areas, enforcers often take action against ... Read more »

Cabinet: Possibly more than 1115 children forced out of their homes in allowance affair

The cabinet recognizes that more than 1115 children of affected benefit parents may have been placed out of their homes. It is now being examined whether the children who are ... Read more »

‘Van mijn 14de tot mijn 21ste rookte ik elke dag wiet. Daarna kreeg ik angstaanvallen en ben ik ermee gestopt'

Rocksterren zijn zelden geboren schrijvers: de meeste muziekbiografieën bestaan omdat een uitgever met een blanco cheque heeft staan zwaaien. “Natuurlijk. Ze hebben me in het verleden vaak benaderd: ‘Vertel maar ... Read more »

Polish prime minister keeps his feet firm in quarrel with EU, Merkel wants dialogue about solution

euro summitEurope must continue to talk about finding a solution to the Poland issue. Pushing contradictions to a head is not a good approach, and a ‘cascade’ of trials before ... Read more »
On free-english-test.com you will find lots of free English exam practice materials to help you improve your English skills: grammar, listening, reading, writing, ielts, toeic