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Table 2 Likelihood ratio tests for observed and expected morph frequencies under different models of autosomal inheritance

From: The genetic basis of discrete and quantitative colour variation in the polymorphic lizard, Ctenophorus decresii

Model of inheritance Probability of O or Y parents being homozygous or heterozygous Morph Expected freq. Observed freq. G df = 3 P
One locus, 3 alleles  Equal O 18 21 13.47 0.004
  Y 21 13   
  OY 14.63 12   
  G 4.38 12   
   HWE O 16.7 21 14.23 0.003
  Y 23.22 13   
  OY 13.32 12   
  G 4.76 12   
   Threshold O 17.25 21 9.29 0.026
  Y 19.75 13   
  OY 15.25 12   
  G 5.75 12   
Two loci  Equal O 13.38 21 5.13 0.163
  Y 15.63 13   
  OY 15.13 12   
  G 13.88 12   
   HWE O 12.31 21 10.76 0.013
  Y 14.83 13   
  OY 21.35 12   
  G 9.51 12   
   Threshold O 11 21 14.42 0.002
  Y 13.5 13   
  OY 23.5 12   
  G 10 12   
  1. ‘Equal’ refers to equal (50:50) probability; ‘HWE’ refers to estimated allele frequencies from the population assuming Hardy-Weinberg Equilibrium; ‘Threshold’ refers to homo- or heterozygoisty assigned based on a threshold for which we used the mean proportion of throat colour (56 adult males). Bold indicates that observed frequencies do not differ significantly from those expected under that model