Genetically blonde and red-heads are distinct apparently. If a person's hair goes a light brown colour, it's not “strawberry blonde” (i.e. red). There's no crossover. Red-heads and blondes have different genes for the hair.Ginger : Take one brunette and one blonde. Breed the pair. You have a 50/50 (it's actually 2 in 4) chance of a redhead offspring . The reason for the high prevalance of red hair in the Celtic countries is the result of blonde Norse, then later Saxon people mating with the originally brunette-to-raven-haired original British inhabitants that go right back to the people of the “Bell beaker” culture, believed to have migrated up the Atlantic coast in antiquity.
True red-heads are the the rarest hair colour.
we used to look after a little girl who had that rich red hair colour, with brown eyes. Very striking.
I've always found genetic and ‘tribal’ differences fascinating. You can still see specific types in regional Britain, or mainland Europe, which tends to be lost in the ‘homogeny’ of cosmopolitanism, and especially in ‘the colonies’ where our little ‘coffee morning’ resides B-)
The Silurian tribe of S.E.Wales (i.e. my lot, with some mongrolisation in my case) were noted by Pliny the Elder as being robust, with tight black curly hair. My 140kg son is a modern “on steroids” version…the originals are only around 1.70cm (5'7"?), and that's still pretty average over there, while he is more 1.90cm+