A blood type is a classification of blood based on antigentic substances found on the surface of red blood cells. Depending on your blood many different antigens may be present on your cells. There are 4 main blood groups A, B, AB and O, of which group O+ is the most common and AB being the least common. The blood type is determined by proteins called antigens found on the surface of red blood cells. If you have the antigen A on the red blood cells then you have got type A blood. When B antigen is present, you have type B blood, when both A and B are present, you have type AB blood. When neither are present you have type O blood.
Another blood group system involves Rhesus factors. The name Rhesus comes from the Rhesus monkeys in which the protein was first discovered. Rhesus factor D, the most important, is found in the blood of 85% of people, they are known as Rhesus positive. The remaining 15% are Rhesus negative. Individuals who are homozygous dominant (DD) or heterozygous (Dd) are Rh+. Those who are homozygous recessive (dd) are Rh- (they do not have the key Rh antigens).
Questions:
1. Why is the Rhesus factor very important during pregnancy?
2. What is the “Universal Donor” and explain what the term “universal donor” is.
3. Is it possible for a person to have B blood types when one parent has type A and one has type AB? Explain or show offspring from this cross.
Subscribe to:
Post Comments (Atom)
1. The Rhesus facor is the Rh D antigen on the surfaces of RBC's. If a fetus has this factor is can cause complications during the pregnancy. One of these complications is the mother's blood can be incompatible with the fetus's. This can result in a disease called Hemolytic disease. This disease can cause Anemia or Jaundice or yellow discoloration of the skin.
ReplyDelete2. A Univeral Donor has the blood type of O. This means that this donor can give blood to any other blood type, however it is only suggested during emergencies.
3. Yes, it is possible for a person to have blood type B if the parents have types A and AB. It can happen with a parent with the genotype IAi and another parent with the genotype IAIB. This way the i from the heterozygous parent moves on as well as the B from the homozygous parent.
1. If a woman is RH negative conceives a baby by a man who is RH positive and the baby is RH positive, it causes complications and produces antibodies and any other babies she has afterward will be attacked by the antibodies and could cause rhesus hemolytic disease.
ReplyDelete2. Blood Type O is thought to be the "universal donor", meaning that people of all blood types can receive it, however, it still might have antibodies that cause serious reactions during transfusion. It's not 100% safe and sure.
3. Yes, probably. I don't think it was explained well enough though.
1)if the child is a Rh baby it cause the antibodies to attack the child and the child might die.
ReplyDelete2)the type of blood that is universal is type O. its also known as the universal donor and can sometimes haveproblem with the antibodies
3)its possible for the child to have b becouse if one of the parents is AB it gives the child the oppertunity to take up the B