The clinal decrease in type B blood from East Asia to Western Europe is probably the result of:

Question

Quizplus · Accepted Answer

The clinal decrease in type B blood from East Asia to Western Europe is most likely due to gene flow - the movement of individuals and their genes from one population to another. People with type B blood likely migrated and interbred less frequently with populations in Western Europe, resulting in a decrease in the frequency of the B blood type in these regions over time.

The Clinal Decrease in Type B Blood from East Asia