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Text File  |  1992-09-02  |  256b  |  9 lines
  1. A twin is one of two young produced from a 
  2. single pregnancy. Human twins may be 
  3. genetically identical (monozygotic), having 
  4. been formed from a single fertilized egg that 
  5. splits into two cells, both of which became 
  6. implanted.  
  7.  
  8. Subject by: Vince Pike
  9.