Hiya, I'm really new to the game so sorry if these are really obvious questions!

1) What is the difference between the green and grey genetics under the genetics tab?

2) How do i know what genetics i want to pass on through breeding?

3) Why are a couple of my pets stats red instead of black?

Thanks very much :)

Green are dominant grey are recessive

Dominant genes will most likely pass on

There are no silly questions! :) 

Stormbringer is correct!

Red states come from genes that have a negative effect. 

There is a list of genes here that let you know which genes do what and how common they are: http://beastkeeper.com/gen-lib

This is a nice guide on genes: http://beastkeeper.com/thread/3382

And this is a fantastic guide on how to breed to get those genes that you want! http://beastkeeper.com/thread/5218/1#43165

Please let me know if you have more questions :) 

thanks a lot :) that makes a lot more sence ;)

Thanks for the links, they are great!

No problem! Like I said, if you need more help feel free to ask! There are no silly questions.