1. 
   Cis and trans
   Cis is healthy, trans is not.
   Found op http://www.bcpa.co.uk/glossary.htm
   
   
2. 
   cis-trans
   test (sis trans) in microbial genetics, a test to determine whether two mutations are located in the same gene or in different genes. A heterozygote carrying the mutations on the same chromosome (cis configuration) will show a wild-type phenotype in either case, but one carrying the mutations on dif...
   Found op http://www.encyclo.co.uk/local/21001
   
   

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