This question is not clear, but I think I understand what you are asking. The difference between alleles of a gene is that some alleles may be dominant or recessive. If one gene has more dominant alleles than another, than it will be more visible.
There are approx 100 billion
The offspring would most likely be purple pea plants.
The primary difficulty is the fact that we do not know all of the organisms that currently exist in the world along with those that existed in the past.
Pretty sure the answer is A
