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Why do so many Scottish animals have red fur or hair, such as red squirrels, red deer, Highland cows and red-headed humans?
Anthony Woodward
Portland, Oregon, US
In humans, the recessive gene MC1R plays a part in producing red hair. Recessive genes are more likely to accumulate in isolated communities. The Highlands and islands of Scotland offer a few impediments to travel, but not many. About 13 per cent of the Scottish population have red hair, compared with about 1 to 2 per cent in the global population.
The genes for red hair probably originated in the grasslands of central…
