It depends. You have to figure the qualification of each of them separately. If your daughter meets the requirements for either qualifying child dependent or qualifying relative dependent in Table 3-1 of IRS Publication 17 at https://www.irs.gov/pub/irs-pdf/p17.pdf on page 25, then your daughter qualifies as your dependent. But take note that if your daughter will be filing a tax return there are three things she must do.
1) Your daughter must select the checkbox for "I can be claimed on someone else's tax return"
2) Your daughter can not claim any dependents on her tax return.
3) Your daughter can not file a joint tax return (if married)
For your grandchild, they would also need to meet either set of rules independently of your daughter.
