Final answer:
A yellow dot in Donor Monitoring indicates that the donor's blood type is compatible with the recipient's blood type.
Step-by-step explanation:
In Donor Monitoring, a yellow dot typically indicates a positive reaction on an immunological test.
When blood is tested for compatibility prior to transfusion, the presence of a yellow dot indicates that the donor's blood type is compatible with the recipient's blood type.
This means that the recipient's immune system will not attack or reject the donor blood.