Talk about the Reciprocal translocation rearrangement.

Two cases (2 pairs and three pairs) -Two pairs: Where two chromosomes are derivatives (subjected to reciprocal translocation) pairing results in tetravalent or cross like structure, which results in four potential meiotic products, pairing of 2 normal non-translocated chromosomes, a pair of 2 translocated but complementary chromosomes (balanced translocation) which segregates via alternate segregation, and 2 pairs of containing deleted and duplicated segments (unbalanced), meaning that aberrant gametes are not the result of only crossing over.