Question about regions splitting

[Haijia Zhou]

I have a question about how regions split.
Let's say we have a 2GB region and upon splitting the region will be
splitted into two 1GB sub-regions.
My first question is: will the two 1GB sub-regions always be on the same
host as the parent region?
My second question is: Let's say the HDFS block size is 64MB, then one 1GB
region will contains about 16 HDFS blocks, will all HDFS blocks always be
on the same host as the region?

Thanks