A Observation in g25

[Jingle Bell]

Hi, i was using g25 and i observed a interesting thing, idk if its a bug or smth but its weird

Here we have the results of 2 averages, Basques and Serfadi:


Target: Basque_&_SW_France:Basque_Spain
Distance: 5.3163% / 0.05316258
55.8 TUR_Barcin_N
26.6 Yamnaya_RUS_Samara
17.6 WHG


Target: Libyan_Jew
Distance: 2.0744% / 0.02074377
29.2 Levant_PPNB
28.8 TUR_Barcin_N
13.0 Kura-Araxes_ARM_Kaps
11.2 Yamnaya_RUS_Samara
10.2 IRN_Ganj_Dareh_N
6.6 MAR_Taforalt
1.0 Yoruba

As we can see, pretty different right? Basques are Beaker-EEF derived while Serfadi are Natufian, CHG and Taforalt, so a individual which is half Basque/Half Serfadi must be 30% "MENA" = 1/2 of what a full serfadi score, right?



Target: 1/2Basque_1/2Serfadi
Distance: 3.2513% / 0.03251335
50.6 TUR_Barcin_N
21.2 Yamnaya_RUS_Samara
7.6 Kura-Araxes_ARM_Kaps
7.6 WHG
6.0 MAR_Taforalt
4.8 Levant_PPNB
2.2 IRN_Ganj_Dareh_N


how tf the MENA is just 20%??? If the expected for a half Serfadi its 30%? But ok, now lets see a 1/4 Serfadi ( which is expected to be 15% MENA, right?)


Target: 3/4Basque_1/4Serfadi
Distance: 4.0291% / 0.04029058
57.6 TUR_Barcin_N
27.6 Yamnaya_RUS_Samara
11.2 WHG
3.6 MAR_Taforalt

3.6??????? How thats fucking possible? Where the Araxes? Where the Natufian??

Someone can explain that for me? Or at least try create a theorie abt that, i discovered this when in a model Portugueses were begin modeled as ~20% Imperial Roman, and Imperial Roman scored abt half "MENA"


Target: ITA_Rome_Imperial
Distance: 1.3404% / 0.01340358
36.0 TUR_Barcin_N
24.2 Kura-Araxes_ARM_Kaps
20.0 Levant_PPNB
14.8 Yamnaya_RUS_Samara
4.8 IRN_Ganj_Dareh_N
0.2 MAR_Taforalt


But for some reason the portuguese sample which scored 20% Imperial Roman scores 0% Levant or Araxes, where this MENA did go? The expected is if the sample can be modeled as 20% Roman that samples must score so 20% of MENA that roman score right? (Hipotethically -> Portuguese Araxes + Levant = 20% x how much MENA romans score)

Or maybe im just dont understanding? Idk its just too confuse

[Jingle Bell]

Someone have can explain pls xd

[gixajo]

Magic.:)

I was going to write a more wide explanation and some probable causes but I'd better summarize by saying that it is an effect of the nature of the tool and the coordinates themselves.

G25 has its limitations, but it does the job better than its predecessors.

[Eurafricanid]

I was going to do a very detailed response, but then I just did the mixing myself and got this:

Target: Basque-Sepharad
Distance: 2.9289% / 0.02928905
34.8 TUR_Tepecik_Ciftlik_N
29.2 TUR_Barcin_N
25.4 Yamnaya_Samara
7.2 WHG
3.4 MAR_Taforalt

too low WHG, there's probably a mixing between it and Kura-Araxes, to make more Yamnaya.
Also, high Tepecik indicates mixing from WHG, Levant and Kura/Iran, to make it.
It's not that big of a deal, since these are very Ancient Calculators and the components overlap.
The calculator is basically merging the components for the best fit.

https://www.theapricity.com/forum/attachment.php?attachmentid=117559&d=1677024126

[Monapps]

Because the sources you use aren't pure but a composite of several ancestral populations. For example EEF can be 'created' combining Natufian and WHG.