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Table 2 Frequency of the musculus Y chromosome, hybrid indices (taken as frequencies of musculusalleles averaged over eight non-Y loci) in males and females, and the census sex ratio according to category of sampling locality.

From: Genetic conflict outweighs heterogametic incompatibility in the mouse hybrid zone?

  DYD DYM M
N (Localities) 20 40 55
Y total 187 448 417
Y musculus 0 369 412
Freq. Y 0 0.824 0.99
Census total 509 1062 1092
Males total 226 545 491
Alleles musculus (Total) 68(2479) 1343(6682) 5124(5551)
Freq. musculus 0.03 0.20 0.92
Females total 283 517 601
Alleles musculus (Total) 54(2858) 1366(6840) 7059(7546)
Freq. musculus 0.02 0.20 0.94
Proportion of males 0.44 0.51 0.45
Pr(Bin) 0.0065 0.2037 0.0005
  1. Pr(Bin) stands for the probability that under the binomial distribution we observe a similar or more extreme deviation from 1:1 by chance alone.