Which blood group is a universal donor?
Although all blood is made of the same basic elements, not all blood is alike. In fact, there are eight different common blood types, which are determined by the presence or absence of certain antigens – substances that can trigger an immune response if they are foreign to the body. Since some antigens can trigger a patient's immune system to attack the transfused blood, safe blood transfusions depend on careful blood typing and cross-matching.The ABO Blood Group System (As shared by American RThere are four major blood groups determined by the presence or absence of two antigens – A and B – on the surface of red blood cells:Group A – has only the A antigen on red cells (and B antibody in the plasma)Group B – has only the B antigen on red cells (and A antibody in the plasma)Group AB – has both A and B antigens on red cells (but neither A nor B antibody in the plasma)Group O – has neither A nor B antigens on red cells (but both A and B antibody are in the plasma)In addition to the A and B antigens, there is a third antigen called the Rh factor, which can be either present (+) or absent ( – ). In general, Rh negative blood is given to Rh-negative patients, and Rh positive blood or Rh negative blood may be given to Rh positive patients.The universal red cell donor has Type O negative blood type.The universal plasma donor has Type AB blood type.I hope, the above statements make the issue cleat to you.
What is the rarest blood type?
The most rare blood of world is AB(-). It's just add upto to be 5% population of world having this blood group..But from recent updates a new blood group INRA type is found which doesn't match with any other A, B, O, AB and also BombayBlood Groupor also called as HH Blood Group.As said a total of only 7 people are having this blood group in whole world.It's just said not a Proper confirmation is their till now.. that why till then AB(-) us the most rare one.Cheers!!
How to figure out the genotypes of the parents?
H = hairless. h = hairy. The ratio is 3:1 (6:2). This is the standard F2 monohybrid ratio. Parents are Hh and Hh. Cross is Hh x Hh. Punnett square is - .......H......h H....HH....Hh h.....Hh....hh Six hairless are HH, Hh, Hh. Two hairy are hh.
Biology Genetic Problems?
Completely lost and confused! Would appreciate some help with understanding how to solve this worksheet. There's like things that deal with punnett squares ect. http://i18.photobucket.com/albums/b109/camgd/Questions.jpg http://i18.photobucket.com/albums/b109/camgd/TheGeneticCode.jpg
How can a woman of blood type A and a man of blood type AB have a child of blood type O?
No. Each parent has two alleles. The AB parent is easy, he has an allele and a B allele. For the A parent, there are two possibilities: AO or AA. The child will get one allele from each parent.This punnett square shows the possibilities for the child if dad is AB and mom is AO:If mom is AA, there are only two possibilities: AA=50% AB=50%.Therefore, without knowing whether the mom is AA or AO, the genotypic ratio for the child is:37.5% AA37.5% AB12.5% A012.5% BOThe phenotypic ratio is:50% Type A (genotypic either AA or AO)37.5% Type AB (genotypic AB)12.5% Type B (genotypic BO)There is no chance that the child will be Type O (genotypic OO)