Final answer:
Reciprocal translocations occur when a segment of DNA is transferred from one chromosome to another, nonhomologous chromosome.
Step-by-step explanation:
A reciprocal translocation occurs when a segment of DNA is transferred from one chromosome to another, nonhomologous chromosome. This means that a piece of DNA from one chromosome breaks off and attaches to another chromosome. An example of a reciprocal translocation is when part of chromosome 9 breaks off and attaches to chromosome 22 in chronic myelogenous leukemia.