According to 23 and me Scientists believe that the variant in this report first appeared in ancient China due to a random genetic mutation, and spread to neighboring regions as people migrated. It's very rare for people who don't have East Asian ancestry to carry the variant, though it does happen. For example, some Iranian individuals have the alcohol flush variant, possibly because millennia ago, traders traveling along the Silk Road brought the variant from China to the Middle East.
Scientists believe that the variant in this report first appeared in ancient China due to a random genetic mutation, and spread to neighboring regions as people migrated. It's very rare for people who don't have East Asian ancestry to carry the variant, though it does happen. For example, some Iranian individuals have the alcohol flush variant, possibly because millennia ago, traders traveling along the Silk Road brought the variant from China to the Middle East.
以前从来不知道呀
哈哈哈
所以美国人叫 asian red 啊