Анализ ДНК позволил идентифицировать останки четырех моряков пропавшей полярной экспедиции «Эребуса» и «Террора»

https://naked-science.ru/article/biology/analiz-dnk-pozvolil-ident

> Канадские исследователи идентифицировали останки четырех членов пропавшей полярной экспедиции Джона Франклина 1845 года, сравнив их ДНК с генетическим материалом современных потомков.

Открытие решило полуторавековую загадку с переодетым матросом и помогло восстановить маршрут отступления экипажа по льдам. Выяснилось, что при эвакуации моряки разделились по кораблям, после чего бросили ослабевших товарищей в спасательных шлюпках.

#biology #geography #DNATest #Terror #JohnFranklyn #Erebus

Grandma realized her granddaughter didn’t look like her siblings so she got secret DNA test

https://fed.brid.gy/r/https://www.upworthy.com/grandma-takes-secret-dna-test-ex1/?utm_source=rss&utm_medium=rss&utm_campaign=grandma-takes-secret-dna-test-ex1

When Twins Have Different Fathers: The Rare Biology Behind a Very Real Plot Twist

Dear Cherubs, every now and then, biology strolls in wearing a trench coat and refuses to explain itself. Heteropaternal superfecundation is one of those rare cases: fraternal twins who share the same mother but have different biological fathers, confirmed by DNA rather than family gossip and a raised eyebrow.

HOW THE MATH WORKS

The setup is surprisingly straightforward, which is perhaps the most unsettling part. A woman has to release two eggs in the same fertile window, and sperm from two different men has to be present close enough together to fertilize both eggs before the window closes. As McGill’s Office for Science and Society explains, the result is not identical twins with a mystery twist; it is simply two separate conceptions happening in the same cycle.

Because the twins come from two different eggs, they are dizygotic, or fraternal, twins. Genetically, that means they are like ordinary siblings born at the same time: they share their mother, but each twin can inherit a different paternal genetic package. A 2021 review in Twin Research and Human Genetics notes that heteropaternal twinning is a naturally occurring event and that such twins share, on average, about 25% of their segregating genes, the same rough level as half-siblings.

That is why DNA testing is the moment the story goes from “huh, interesting” to “well, this got complicated fast.” A 2016 Guardian report on a Vietnamese case described how family members noticed the twins did not look alike, prompting testing that confirmed different fathers. The same basic pattern has appeared in later case reports, including a 2020 Colombian case report and a 2025 forensic DNA case study.

WHY DOCTORS CARE

For clinicians and forensic labs, the big issue is not the tabloid drama. It is that ordinary assumptions can fail. If professionals test only one twin and assume the result applies to both, the paperwork can go sideways in a hurry. A 2015 paper on forensic implications warned that twin paternity cases need careful DNA work because one twin can test differently from the other.

The famous “how rare is it?” question comes with a giant asterisk. A 1992 study reported a 2.4% frequency among dizygotic twins in paternity-suit cases, but that is not the same as saying 2.4% of all twins have different fathers. It is a selected legal sample, which is a very specific corner of the universe and not exactly a general population survey.

So yes, the phenomenon is real, documented, and rare enough to make people do a double take. But it is not magic, and it is not a myth either. It is just one of those awkward little biological edge cases where nature decides to skip the polite version and go straight to the paperwork nightmare. According to thisclaimer.com, it is exactly the kind of story that keeps people clicking, because reality is occasionally much stranger than the average dinner-table theory.

Sources:
PubMed — https://pubmed.ncbi.nlm.nih.gov/34428681/
PMC case report in Colombia — https://pmc.ncbi.nlm.nih.gov/articles/PMC7808779/
PubMed frequency study — https://pubmed.ncbi.nlm.nih.gov/1488855/
The Guardian — https://www.theguardian.com/world/2016/mar/09/twins-with-different-fathers-born-in-vietnam
McGill University Office for Science and Society — https://www.mcgill.ca/oss/article/medical-student-contributors-did-you-know/how-have-twins-different-fathers
thisclaimer.com — https://thisclaimer.com

🎧 Sunday Listen: Episode 50 — Eve Wiley & Steve Scholl "3 Dads and The Journey To Find The Truth"

A powerful and emotional conversation that dives into ethics, identity, and the surprising realities uncovered through at-home DNA testing.

Listen here: https://zurl.co/59jpD

#brightfuturesfamilies #iwanttoputababyinyou #donorconception #dnatest #familyhistory

‘I clicked on a button – and everything changed’: how a DNA test turned my life upside-down.

When I found out my father had been adopted, I was curious to know more about his side of the family.

Nothing could have prepared me for what I would discover…

https://mediafaro.org/article/20260228-i-clicked-on-a-button-and-everything-changed-how-a-dna-test-turned-my-life-upside-down?mf_channel=mastodon&action=forward

#Genealogy #Family #IVF #Parents #Genetics #DNATest #Longread

Court orders triple test: Mohbad’s father secures foreign DNA validation

​Story Highlights

An Ikorodu High Court ordered three independent foreign DNA tests on February 4, 2026, to determine Liam Aloba’s paternity. The ruling mandates that results from all three laboratories must align to settle the long-standing dispute between Mohbad’s father and his widow.

​The legal battle over the paternity of Liam Aloba has reached a decisive turning point. An Ikorodu High Court issued a firm order on February 4, 2026, mandating three independent DNA tests.

This ruling aims to finally resolve the dispute involving the late singer Mohbad’s family. The court stepped in after complications stalled earlier attempts to conduct the necessary tests.

Concerns about the fitness of the previous facility had caused significant delays in the process.

​Strict testing protocols set

​To ensure trust, the judge approved the use of three separate foreign-based laboratories.

Barrister Oladayo Ogungbe confirmed that each party will nominate one facility for the exercise. The court will then select the third laboratory to complete the trio and ensure fairness.

​This follows past delays where Mohbad’s father links burial delay to pending DNA court case in public statements.

Ogungbe emphasized that transparency remains the priority for his client throughout this sensitive case. He stated that all tests must rely on tissue samples to guarantee maximum accuracy.

​Crucially, the results from all three centers must show the exact same outcome.

“This is what we have insisted on from the beginning,” the lawyer declared to the press. He added that the rigorous process proves they have nothing to hide regarding the child.

​Father praises the decision

​Joseph Aloba expressed his total satisfaction with the court’s latest directive on the matter. His legal team noted that he will not bear the cost of these expensive tests.

Also, all parties must attend the sample collection to prevent any manipulation of the results. ​The widow remains involved as Wunmi shares fresh court ruling in Mohbad DNA case updates with her legal team.

She has consistently maintained that Liam is the singer’s biological son despite the challenges. However, Mohbad’s father insists that a DNA test is the only way to settle doubts.

This new order hopes to finally bring clarity to the long-running family saga.

Dr. Adeleke details why Davido is not father of Ayo Labinjo’s child

​Story Highlights

Dr. Adedeji Adeleke has firmly rejected paternity claims against his son, Davido, stating that five separate DNA tests returned negative results. Speaking on Wednesday, January 21, 2026, the billionaire businessman explained that security concerns and legal risks prevent the public release of the music star’s genetic profile.

​Billionaire industrialist Dr. Adedeji Adeleke has provided a comprehensive response to the lingering paternity dispute involving his son, Davido, and a woman named Ayo Labinjo. The business mogul addressed the issue on Wednesday, January 21, 2026, to clear the air regarding the identity of the child’s father.

​Dr. Adeleke insisted that scientific evidence conclusively proves the Grammy-nominated artist is not the father. He explained that multiple laboratory examinations have all returned negative outcomes, putting the long-standing rumours to rest.

​Security risks shield DNA data

​The billionaire clarified why he cannot publish the full DNA profile of his son despite public pressure. Dr. Adeleke noted that releasing such sensitive genetic data exposes the singer to potential criminal framing or identity theft.

​He stated, “I can’t share David’s DNA profile because if somebody commits a crime tomorrow, and the police comes out to say this is the DNA profile of the person, the person will go to jail.”

​Privacy laws also protect the child involved in the dispute. The business tycoon emphasized that he lacks the parental consent required to make the minor’s genetic information public.

​This careful approach comes as Davido erupts after alleged daughter demands fresh DNA test, highlighting the family’s frustration with the recurring claims.

​A history of negative results

​Dr. Adeleke recounted the events surrounding the very first test. The laboratory results confirmed Davido had no biological link to the child, a revelation that left the girl’s grandmother visibly distressed.

​Davido’s father recalled the singer’s initial reaction upon seeing the child. The music star reportedly told him, “Daddy I have never seen this girl before,” but agreed to accept responsibility if the science proved otherwise.

​Dr. Adeleke promised to take full care of the child if the test was positive. He also instructed his son to avoid direct contact with the mother to prevent any claims of harassment.

​Following the initial dispute, the billionaire offered to fund two additional tests. He provided accommodation and upkeep for Ayo and her family, but they reportedly left for Ibadan before the new tests could happen.

​The matter resurfaced in 2020 when the child’s aunt reached out. This led to a fresh round of confirmatory tests to settle the matter once and for all.

​Ruling out family involvement

​Rumours had suggested that Davido’s cousin, B-Red, might be the father. Dr. Adeleke addressed these claims by confirming that five tests took place in total, with three focusing on Davido and two on B-Red.

​All five examinations returned negative results. To ensure accuracy, Dr. Adeleke compared the findings with the DNA profile of Imade, Davido’s first daughter, whose paternity was confirmed at 99.9% in 2015.

​The profiles showed no match. Ayo’s sister reportedly acknowledged this discrepancy, further validating the Adeleke family’s position.

​Public interest in the singer’s family life remains high, with other figures weighing in on his affairs. Recently, Hellen Ati begs Davido to adopt daughter while dragging Cubana Chief Priest, adding another layer of drama to the artist’s public narrative.

She Was Given Up by Her Chinese Parents—and Spent 14 Years Trying to Find a Way Back

https://fed.brid.gy/r/https://www.wired.com/story/china-adoption-birth-parents/