Figure 1
The breakpoint graph. The breakpoint graph of 
and 
. Note that there is no black edge (4
h
, 3
h
), as 3
h
is a telomere in ρ. The edge (2
t
, 3
t
) has a multiplicity of 2, all other black edges have a multiplicity of 1. The edge (2
h
, 2
h
) is a loop. The breakpoint graph consists of 5 components, the black edge (5
t
, 6
t
) is a 1-bridge, the pair of black edges (1
h
, 5
h
), (2
h
, 5
h
) is a 2-bridge.