On the humorous side.
You have a pet chromosome? How nice for you! However did you choose one from the 23 pairs you have? Well, you could call it micro-mini-me or mike for short.
If you like 'Nan' as a nickname, then yes, it is a good nickname.
Chromosome 7.
A good nickname for what? Sounds a bit pansy
autosomes
It does not require a nickname.
Jaz might be a good nickname
A good nickname for Sheila could be Shei or Shelly.
A good nickname for Zekrom would be "Black Dragon".
Well my friend is called Kristen her nickname is krissi.
Kenster, Ken, Kenny...
There are 46 chromosomes in human cells.
The good nickname for christian is chriss killr