As in, normal group preference, genophilia. No mutations.
Reminds me of the study that found distant cousins most fecund.
Britons are still living in the same ‘tribes’ that they did in the 7th Century, Oxford University has found after an astonishing study into our genetic make-up. Archaeologists and geneticists were amazed to find that genetically similar individuals inhabit the same areas they did following the Anglo-Saxon invasion, following the fall of the Roman Empire.
In fact, a map showing tribes of Britain in 600AD is almost identical to a new chart showing genetic variability throughout the UK, suggesting that local communities have stayed put for the past 1415 years.
Geneticist Professor Sir Walter Bodmer of Oxford University said: “What it shows is the extraordinary stability of the British population. Britain hasn’t changed much since 600AD.
“When we plotted the genetics on a map we got this fantastic parallel between areas and genetic similarity.
The findings also showed that there is not a single ‘Celtic’ genetic group. In fact the Celtic parts of the UK (Scotland, Northern Ireland, Wales and Cornwall) are among the most different from each other genetically.
And the research has finally answered the question of whether the Romans, Vikings and Anglo-Saxons interbred with the Brits or wiped out communities.
The team found that people in central and southern England have a significant DNA contribution from the Anglo-Saxons showing that the invaders intermarried with, rather than replaced, the existing population.
By choice or rape?
But there is no genetic signature from the Danish Vikings even though they controlled large parts of England – The Danelaw – from the 9th century, suggesting they conquered, kept largely to themselves, and then left. Only Orkney residents were found to have Viking DNA.
“We found that 25 per cent of the DNA of someone living in Orkney is from Norse ancestry which suggests that when the Vikings arrived they intermingled with the local population rather than wiping them out,” added Prof Peter Donnelly.
“Similarly the Saxons in Germany have contributed DNA to some of the English groups but not to some of the others. We can see not only the differences in the UK but the reasons for those differences in terms of population movements.”
Inbreeding is great if you have low genetic load in the participants, it preserves the health, looks and intellect of the bloodline. The breeding of good breeding was this deliberate sexual selection for fitness. It’s only a problem when you introduce mutations. They compound.
Outbreeding is far more likely to produce diseased or infertile offspring, much like a liger or a mongrel, the depression of mutations in genetic load can occur in a single generation.