Answer:
Gene pool stays the same.
Explanation:
no link. sorry I can't help
I'm not quite sure what you mean by which sphere, but I found that the most abundant gas on earth is nitrogen at 78%. Hope this helps
Answer:
25% type A, 25% type B, 25% type AB, 25% type O
If you put it into a punnett square:
B O
A AB AO
O BO OO
you get 25% for each phenotype