[quote author=“BBC News (2002)”]Blondes ‘to die out in 200 years’
The last natural blondes will die out within 200 years, scientists believe.
A study by experts in Germany suggests people with blonde hair are an endangered species and will become extinct by 2202. Researchers predict the last truly natural blonde will be born in Finland - the country with the highest proportion of blondes. But they say too few people now carry the gene for blondes to last beyond the next two centuries.
The problem is that blonde hair is caused by a recessive gene.
In order for a child to have blonde hair, it must have the gene on both sides of the family in the grandparents’ generation.
[quote author=“Wikipedia”]Disappearing blonde gene
Disappearing blonde gene was a hoax that started circulating in the media in 2002. According to this hoax, the World Health Organization, or other experts, published a report that people with blond hair “will become extinct by 2202”.
The hoax has two parts. First, neither WHO nor any reputable expert has issued such a report.
The second part of the hoax is the claim that blonde populations would eventually disappear. This is based on a misunderstanding of recessive genes. To show (or “express”) the effect of a recessive gene, such as the phenotype for blondeness, a person must inherit the gene from both parents. A recessive gene inherited from only one parent is masked by a dominant gene, and not expressed. However, a recessive gene may be passed on to children. A child may be blonde even if both parents are non-blonde, so long as both parents pass on the recessive blonde gene. Unless a gene is associated with a disadvantage to survival or reproduction, it will continue to be passed on to future generations and occasionally expressed. In fact, under assumptions of the Hardy-Weinberg principle, the concentration of the gene in the population will remain constant.
A number of news agencies, such as Canadian Press and BBC News took the bait. In 2002 the BBC News (and others) reported that unnamed German scientists had concluded that the natural distribution of fair hair would cease within the span of 200 years due to the genes associated with fair hair being recessive.
Also, Snopes traces this urban legend back well over a century.