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Table 2 Two-sided model

From: Fractionation statistics

event i a -7 -6 -5 -4 -3 -2 -1 0 1 2 3 4 5 6 7 8 r
start    1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1  
    1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1  
1 -1 3 1 1 1 1 1 1 0 0 0 1 1 1 1 1 1 1 1
    1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1  
2    1 1 1 1 1 1 0 0 0 1 1 1 1 1 1 1 1,1
  -4 1 1 1 1 0 1 1 1 1 1 1 1 1 1 1 1 1  
3 4 4 1 1 1 1 1 1 0 0 0 1 1 0 0 0 0 1 1,1,1
    1 1 1 0 1 1 1 1 1 1 1 1 1 1 1 1  
4    1 1 1 1 1 1 0 0 0 1 1 0 0 0 0 1 3,1
  -5 4 1 1 0 0 0 0 1 1 1 1 1 1 1 1 1 1  
  1. Four deletion events affecting two homeologous chromosomes, leading to two runs of single-copy genes. The fourth step illustrates how further deletion (at i = –1) and the “skip” process (at i = 2) are blocked when a single-copy gene is encountered (i = –1) on the homeologous chromosome, truncating the geometric variable a.