It all depends on the person, Im part Jap and have a tiny bit of Native American in me as well and the smell of alcohol will turn me red within the hour. Im definately a cheap date as well and if by some magic I get a 6 pack down.... oh boy.. someone better be around to hold my hair.
It all has to do with genetics, the gene mutation is more dominant than the heredity of alcoholism. My dad is a recovering alcoholic and he can still drink a TON and be fine.. me a drink or 2 and Im well on my way to lala land. My mom doesnt get as flush as I do, and neither does my brother. I turn a skin cancer 3rd degree sunburn red and it spreads about my body as I drink and time goes on lol. Im also the most fair skinned of my family.
But Asians and Native Americans can be, easier to get drunk. hehehehe..