Final answer:
The question hints at a biological trait more common in Asian, African, and Mediterranean people compared to Caucasians, which could pertain to things like lactose intolerance or skin pigmentation. The lack of specific information makes it difficult to provide an exact answer, but it suggests differences in the prevalence of certain genetic traits among different ethnic groups.
Step-by-step explanation:
The incomplete information provided in the question makes it challenging to pinpoint exactly what is being referenced. However, the mention of a specific characteristic present in a high percentage of certain ethnic groups and a low percentage in Caucasians could refer to a biological trait such as lactose intolerance, incidence of particular genetic conditions like thalassemia, or phenotypic features like skin pigmentation. Without additional context, it is difficult to provide a precise answer. One example relevant to ethnic group differences in a biological trait is the prevalence of lactose intolerance; it is higher in Asian, African, and Mediterranean populations and lower among those of Northern European descent.