Chromatids thats your answer to that question.
The dark reaction of photosynthesis is called the Calvin cycle or Calvin - Benson cycle.
It is a series of chemical reactions that occur in chloroplasts during photosynthesis.
It is also known as the light - independent phase because it happens after light energy ahs been absorbed from the sun.
It is named after scientist called Melvin Calvin who was the winner of a Nobel prize in chemistry for finding how this cycle works way back in 1961, at the university of California.
