You need to read your application guide at
http://www.cic.gc.ca/english/pdf/kits/guides/EG7.pdfOn page 25 it says
Family members include a spouse, or a common-law partner and dependent children:On the Additional family information form they ask the names of your parents and siblings and you should fill them out there but as I have explained to you before, you can not include your mother and brother on your application form as accompanying family members because they can not be classified as your dependents. You have to apply as PR first. When you become PR, you can apply to sponsor your mother and include your brother as your mothers dependent.