uno as avr isp for 2560 ; will it work?

Hi everyone, I am old school ( vaccuum tubes and transistors, for those that know what they are) so i have a basic understanding of this stuff, but I do get stuck easily. :roll_eyes:
I have read and understand how to make the uno into an isp using the 10uf capacitor, and the uno has been programmed.

My question is: can the uno be used to upload a bootloader to my 2560 and or the firmware that I need to run?
Thanks in advance