Answer:
A. Compounds contain fixed ratios of different elements.
Explanation:
Water always has this 2:1 ratio of hydrogen to oxygen. Like water, all compounds consist of a fixed ratio of elements. It doesn't matter how much or how little of a compound there is. It always has the same composition.
Is this actually a question? Lol.
Answer:
I think it might be A. I'm not sure.
I'm pretty sure it's recessive?
1.Aa
2.aa
3. Aa
4.aa
50% Aa and 50%aa