Crundy writes
Hmm, my potatoes that I'm chitting are turning quite green. Is it
normal for the entire seed to go green?

The entire potato will go green if it's in the light- it's why you earth
up potatoes, so the ones at the top don't turn green.

I presume by 'seed' you mean 'seed potato' ie small tuber, since of
course the potato fruit is like a small (but poisonous) tomato with a
lot of small seeds inside.
--
Kay