What it smells like
so they can draw the blood type and save someones life
The blood type of the parents. It is inheritable.
There is no personality correlation with blood type. They blood type you have are as a result of the pairing of your parents, and you may inherit some of their traits, but it is not blood that determines them.
By the presence or absence of two antigens.
A simple blood test determines your blood type. A lab technician will categorize type "O", type A, type B, type AB. Antigens in the blood sample are analyzed to determine what letter to assign your blood.
They are located on the red blood cell membrane. n the case of the ABO blood type system, they are actually sugars. The absence of these sugars means the person is type O the presence of either A or B means the person is either type A or B. The prescience of Both A and B means the person is type AB.
What determines a persons blood type and stimulates antibody formation
Blood type is not a sex-linked trait. Both parents contribute equally to determine a child's blood type.
In order for your baby to have type b blood, at least one parent must have either type b or type ab blood. Blood type probabilities can be determined for babies by using a blood group calculator. Once a baby is born, the babies' blood will be tested to determine blood type.
People with type A blood can give blood to people with type A or type AB, but you do need to take the Rh factor into consideration. The Rh factor is what makes a person have type A+ or type A-, etc. There are also other types of very rare antigen in the blood that make up the other blood type which is beyong the scoop of discussion here.
Blood types does affect personality's, If you are an O blood type your personality is you want to be a leader, if you see something you want you keep trying until you get what you want and get very jealous at times.
A person can have A, B, AB, or O blood types. This is why when they transfuse blood to another person they have to make sure it is the same blood type or their body rejects it.