In Canada, despite its dubious record in regard to both Aboriginal and African-Canadian people, there has never been (as far as I know) legal recognition of any 'blood quota' concept. As a consequence, it is very rare to hear members of either of those minorities use such terms as 'full-blooded', 'one-quarter' this, 'one-sixteenth' that, etc. The idea of measuring racial quotients seems alien if not distasteful to both groups (speaking generally, with the usual provisos, etc.).