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I’m going to explain how it’s possible to change 100% of an individual’s autosomal content in just 4 generations while maintaining a specific Y chromosome. The goal is to obtain a dog that carries the characteristic Y chromosome of a German Shepherd, but whose autosomal genome is essentially...

First of all, I apologize for being disrespectful, but I felt deeply offended by being answered by an AI in a forum that is supposed to be based on scientific rigor. What I meant to say is this: To say that a sample is “contaminated” implies that the issue is biologically or experimentally...

Y DNA can't be contaminated because it's haploid. Only an insane person couldn't distinguish between the ancient sequence and the contaminated ones, whether it's been contaminated by 1 or 500 fucking people. Contamination in Y subclades was a thing back when tests were done with PCR. Now, it's...

I have a degree in biology, and I’m a professional breeder. Don’t copy-paste some image from the internet. Explain in your own words how it’s even possible to contaminate the Y chromosome in ancient samples in the year 2025 — let’s see if you can articulate something coherent without...

Y-DNA cannot be contaminated, that’s an urban legend spread by people who are illiterate in biology.

I didn’t take it from any article. It’s simply a summary based on the empirical data available in the year 2025. The Bell Beaker culture was always of Iberian origin, both materially and genetically. The steppe DNA rates in Central Europe come from Corded Ware females, not from the steppe...

The R1b-DF27 Lineage and Its Foundational Branches in the Iberian Peninsula: A Legacy of Genetic and Cultural Continuity Since the Bronze Age Abstract: Recent phylogenetic analyses based on high-resolution SNP data, TMRCA estimates, and current geographical distributions of R1b-DF27 and its...

That summary seems to be based on many estimations. With the available data, it cannot be taken for granted that the Bell Beakers genetically expanded from Central Europe toward the south. A rebuttal to that chronological framework: 1. The origin of the Bell Beaker culture • The earliest Bell...

The frequencies of each group may have varied significantly over time, but that southern region of France seems to have been influenced by the three “P312 brothers” since at least 2500 BCE, and they were likely present in the area even earlier, expanding northward. The picture changes a lot...

I find the U152 rates in the southwest of the Iberian Peninsula very suspicious, particularly in the area of the Tagus River near Lisbon. The north is more dominated by DF27* (30%) with ZZ12_1* (around 2550 BC), while the south shows some peaks of about 30% U152, whose exact subclades we don’t...

Yes, in a way it’s a dead end 🤣 On the other hand, it’s a relief because I don’t waste time tracing lineages—just living in Spain means my “recessive endogamy” inevitably falls back on DF27, since the average Spaniard always has at least 3 to 6 great-great-grandfathers who were DF27.

There isn’t enough empirical data to clarify the “seed planting” of L151*. From 2010 to 2020, it was thought that there was only a single jump between P310 and P312, but over time more have emerged, and more will continue to appear—unless all 8 billion people on the planet get tested. But even...

I understand that my hypothesis may seem unusual, but it is empirically possible. Between P310 > L151 > P312 there isn’t just a single generation—there can be one or many. Subclades represent “dynasties,” not individuals; they are a kind of lineage consolidated over time. Typically, a subclade...

If autosomal DNA can be extracted from a sample, the very first thing that can be revealed with full precision is the deep subclade. There’s no such thing as being able to read M343 but not the rest. What was leaked in 2010 came from a screenshot of the private data from the study. No serious...

Considering that more than 10 mummies have tested positive for P310 in periods ranging from the Predynastic to the Roman era, it’s quite clear to me.

https://www.researchgate.net/publication/353306320_Linajes_maternos_y_paternos_en_la_familia_del_rey_Tutankamón Aquí está el estudio que confirma que la Dinastía XVIII pertenece a M343. Los investigadores conocen el subclado más profundo, pero no lo harán público. No es que falten datos: se...

If they reveal that he’s within P312, there are over 300 million men who could claim his body as their relative. I wouldn’t have made the exact subclade public either if I were part of the study team, but they know it — we only get to know that he’s within M269, and that alone validates an...

There’s a lot of misinformation out there about contamination and degraded samples. Contamination used to be a problem back when “analog” methods like PCR-based detection were used, where only specific DNA fragments were amplified. In those cases, you had to know exactly which mutations you...

It seems that when it comes to the oldest subclades like L51*, P310*, and L151*, there’s very little data available, and most of it comes from studies with extremely small sample sizes or is derived secondhand from other research. I’ve seen a map showing L51* reaching frequencies of 8% in...

What I want to point out is that, based on the study’s data, the oldest documented forms of DF27 so far appear to be concentrated in the western part of the Iberian Peninsula, near the Atlantic regions. It gives me the impression that around 3000 BC, a related elite arrived, exploring various...