Number of time a gene occurs in a gene pool

If jane has the blood type ab and marries john who has type o blood what are the possible phenotypes of their first kid?

Which short-term environmental changes would a very small asteroid or comet impact on earth most likely cause? check all that apply. flooding extinction craters on surface changes in weather patterns death of organisms and populations

Why were the results whit just water so much different than the trials with the detergent ?