Populating UserForm With Arrays

I want to populate a drop down with items in an array (aMasterList) which contains a list of arrays (aList1, aList2, etc.). When I select an item from the drop down, I want to populate a List Box on the same form as the drop down with items contained in the corresponding named array. Here’s what I have:

UserForm1
DropDown1
ListBox1

Sub PopulateForm()

Dim aMasterList(), aList1(), aList2(), aList3()

‘Load into DropDown1
aMasterList = Array("aList1", "aList2", "aList3")

‘User selects from drop down and the below items populate ListBox1
aList1 = Array("Green", "Blue", "Yellow")
aList2 = Array("Apple", "Pear", "Grape")
aList3 = Array("Flowers", "Trees", "Bushes")

End Sub