No. Assuming you are a United States citizen, your paren would be considered an immediate relative. There are no derivative beneficiaries of immediate relative petitions. You would have to file for your parent and sibling independently. Your parent can also petition for your sibling once he/she becomes a green card holder. You can read more about family immigration at http://myattorneyusa.com/family-immigration.
Answered on Apr 18th, 2016 at 3:48 PM