Final answer:
The term 'contra-translocational translocation' is not recognized in genetics. The standard term is 'reciprocal translocation', which is when chromosome segments exchange between nonhomologous chromosomes without any genetic information lost or gained, sometimes leading to health issues like cancer or schizophrenia.
Step-by-step explanation:
Understanding Contra-Translocational Translocation
When discussing translocations in genetics, we are referring to the event where a segment of a chromosome dissociates and reattaches to a different, nonhomologous chromosome. These can be benign or have severe consequences depending on the alteration of gene positions relative to their regulatory sequences.
A reciprocal translocation is a specific type of translocation that involves the exchange of chromosome segments between two nonhomologous chromosomes, with no gain or loss of genetic information. This can sometimes be associated with cancers and other conditions such as schizophrenia. The term 'contra-translocational translocation' does not appear to be a standard term used in genetics, so we may assume the intended term was perhaps 'reciprocal translocation.'