For blood type B, the genotype is BB or BO with A as the antigens and B as antibodies. The blood type AB has the genotype to be AB. The antigens are both A & B, and no antibodies on the blood plasma. The blood type O has the genotype to be OO. There are no antigens but has antibodies to be A or B. Rhesus factor or the 'D' antigen is also found on the surface of the red blood cell. Those with it are seen to be rhesus positive or Rh+ and those without are rhesus negative or Rh-.
Dark of the Moon. The Dark of the Moon is traditionally the last three days of the Lunar cycle, immediately preceding the New Moon, and the time when the night sky is notably absent the presence of the Moon.
The original astronomical definition is that a Blue Moon is the 3rd Full Moon in an astronomical season with 4 Full Moons. A normal year has 4 astronomical seasons - spring, summer, fall (autumn), and winter - with 3 months and normally 3 Full Moons each. When 1 of the astronomical seasons has 4 Full Moons, instead of the normal 3, the 3rd Full Moon is called a Blue Moon.