This video discusses physical characteristics of Koreans and other Asian ethnic groups. The host, Liry onni, addresses five common stereotypes:
1. Koreans having little to no body odor: This is largely true due to a genetic mutation in the ABCC11 gene, which affects apocrine secretions. Koreans have a high percentage of the AA genotype, which results in less body odor.
2. Koreans having dry earwax: The same ABCC11 gene determines earwax type. Asians, including Koreans, tend to have dry earwax, while those with more of the type G have wet earwax and are more prone to strong body odor.
3. Most Koreans being skinny: Korea has one of the lowest obesity rates in the OECD, with many Koreans having a thin build. This is attributed to a combination of genetics and environment.
4. Koreans having little body hair: This is true, especially for men, who often have little to no chest hair. This may be an adaptation to cold climates, where body hair can get wet and increase the risk of freezing.
5. Koreans being born with birth spots (Mongolian spots): 97% of Koreans are born with these bluish or greenish spots on their backs or buttocks. These spots are benign and usually disappear in childhood.
Additionally, the video mentions that Koreans have a low incidence of celiac disease, likely due to a low probability of having the special gene (HLA-DQ2) that causes it.
Here are the key facts extracted from the text:
1. The ABCC11 gene determines the type of wax or earwax in humans.
2. There are two types of wax: sticky, wet wax and dry, flaky wax.
3. People with more of type G in the ABCC11 gene produce more apocrine secretions, which can lead to stronger body odor.
4. People with more of type A in the ABCC11 gene produce less apocrine secretions and tend to have less body odor.
5. Almost all Asian ethnic groups have more of type A in the ABCC11 gene, but Koreans have the highest percentage of having the AA genotype.
6. A study found that 100% of Korean participants from the city of Daegu had the AA genotype.
7. The percentage of people with the AA genotype varies among Asian countries, with Vietnam having 53.6%, Thailand having 63.3%, Japan having 69%, Mongolia having 75.9%, and China having 80.8%.
8. At least 2% of Europeans do not smell due to their ABCC11 gene type.
9. The percentage of people with the AA genotype in Latin America depends on their ethnic origin.
10. In Mexico, the trend is similar to that of Europeans.
11. In Argentina, at least 800,000 people would not need to use deodorant due to their ABCC11 gene type.
12. Korea is the second country with the least obese population in the OECD, after Japan.
13. The average height of Korean men is 1.75 cm, and women is 1.63 cm, according to 2019 data.
14. Before 70 years ago, Koreans were significantly shorter due to food scarcity.
15. Most Koreans have black hair, with some having brown or dark brown hair.
16. The majority of Koreans have straight or semi-straight hair, with only 13.8% having curly or wavy hair.
17. Koreans generally have little body hair, with almost no Korean men having chest hair.
18. The Mongolian spot is a common birthmark found in 97% of Koreans.
19. The Mongolian spot is a bluish or greenish spot that appears on the baby's back or buttocks and disappears in childhood.
20. The spot is more common in Asians, with 81.5% of Japanese and 86.3% of Chinese having it, compared to 5-10% of white children.
21. Only one case of celiac disease has been reported in Korea, in 2016.
22. The probability of people having the gene that causes celiac disease is low in Asia, especially in Korea.