Create a dropdown and a checkbox along with it whenever a checkbutton is checked in tkinter

I am new to programming, help would be much appreciated. I have written a code in python 3. In my code I have a drop-down which contains a list of inputs and a checkbox. What I want is that every time I check the checkbox, a drop-down should be created along with a new checkbox. The new created checkbox serves the same purpose as the previous checkbox. Now, when I check the new checkbox, the previous process repeats giving me another checkbox and a drop-down. I'll be grateful for any kind of help. Thanks.