It is 200 million years because it has been around for a long time.
The correct answer is (A) Chromosomes.
The color of the horse coat is determined by chromosomes. The genes present on the chromosomes is responsible for the coat color of horse. The dominant coat color of the horse is transferred to the horse from its parents. This is inherited pattern and the coat color can be black, white, brown, etc.
I’m not exactly sure, but I’m thinking it may be A . I just learned about this unit previously .
D. Or A. It’s between those two
