> 1) indel events are not observed data (that is one does not
> observe gaps in a sequence), they are matter of inference, thus, should
> not be treated as observed data points (i.e., code them as "missing").
Length differences are as 'observed' as polymorphisms at 'inferred'
Dept. of Systematic Botany
Carl Skottsbergs Gata 22
S-413 19 Goeteborg
bengt.oxelman at systbot.gu.se