baby seems aggressive

my 1 y.o seems very aggressive. It's been that way since she could show emotion. She'll flip out over practically nothing. she bites her brother if he gets close she'll bite an object if it's not going the way she wants it to. I once put my finger in front of her bite to see what she would do and once she realized it was my finger she pulled away without a bite. She seems pretty angry but she's so lovable and loves hugs and cuddles and laughs and plays... is this something that will go away??