Best Answer: Your genotype determines your blood type before your born. There are three alleles or versions of the blood type gene: A, B, and O. Since everybody has two copies of these genes, there are six possible combinations; AA, BB, OO, AB, AO, and BO.h is not passed down from parents. With your parents having AB and O, you can only have type A or type B blood because O is recessive. You could have type O if your mother was AO or BO, but she isn't. Since you have type A, your blood is AO (A from your mother and O from your father... but A is dominant).
Rating Newest Oldest. Best Answer: Officially, the third week of September when Fall starts all over the U.S at the autumnal equinox - this year it is September 22nd. And you can find this answer easily through many other methods, like simply googling when does fall start.. You'd be surprised how google search can answer questions.
the time when fall starts is between summer and winter as with the other seasons its commencement differs and is based on the hemisphere you are in commencement dates in astronomical terms the season begins on september 22 up to november 22 in the northern hemisphereuring olden times the season was just referred to as harvest time the word autumn was derived from a latin word and was first used in the 12th century however it did not gain wide usage until the 16th century by that time the word fall and autumn came into use