Table 1. Proportions of simulations where at least one host allele became extinct, in nine sets of 10,000 pairs of interaction matrices that differ by the range of fitness values in hosts and parasites ( and ).

Extinction of one or two host alleles:
	27.4%	29.1%	34.9%
	21.1%	20.1%	24.2%
	0.0%	0.0%	0.0%

For all simulations, the standard set of parameters was used.