Chromosomal inversion is a situation involving the segment of a chromosome where it is turned upside down and reinserted back into the chromosome. This usually occurs because of a breakage and rearrangement occurring within a single chromosome.
It is of a two types, these are
* Paracentric chromosomal inversion - a type where a segment not including the centromere is snipped out, inverted, and inserted back to its location on chromosome.
* Pericentric chromosomal inversion - is a type where a segment including the centromere is snipped out, inverted, and inserted back to its original location on chromosome.
THE blood group AB is called the universal receiver because any other blood group can be compatible with this blood group this is due to the absence of anti-bodies in this type
while blood group O is called the universal donor because it is compatible with all blood groups due to the absence of antigen (A and B)
while blood group A receives blood from itself and O and donates blood to itself and AB thesamethinggoeswithbloodgroupB
