Assertion: american bison's number | /r/HasProperty | uncertain
Facets:
Source sentences:
text: The numbers are uncertain because the tests used to date—mitochondrial DNA analysis—indicate only if the maternal line (back from mother to mother) ever included domesticated bovines, thus say nothing about possible male input in the process.
text: The numbers are uncertain because the tests so far used mitochondrial DNA analysis, and thus would miss cattle genes inherited in the male line.