PSR broods resulting from F1 crosses with triploid females

Sex: phenotypeTest (PSR)Possible genotype(s)(n)Percent observedPercent expected
♂; oyster40oy137.15.9
No progeny3
♂; wild-type43st +/+ oy126.98.3
st +/+ oy;PSR2614.916.9
No progeny5
♂; scarlet112st or st/st2923.118.8
st;PSR or st/st;PSR4435.038.1
No progeny5
Total progeny (F2)195
Number of broods29
  • Broods resulting from F1 crosses of triploid females (st +/ + oy/st +) and haploid PSR males (st;PSR) are categorized by their sex and eye color phenotypes. These broods resulted from the 29 test crosses where the F1 male harbored a functional PSR. Multiple genotypes are possible for each of the phenotypic categories. Each of these F2 categories is broken into subgroupings of PSR and non-PSR males based on observations of the broods (F3) resulting from crosses of these males with garnet females as described in the text. Each phenotype is also expressed as a percentage of the total progeny. These percentages are compared with the percentages predicted by the model. These predictions use values of m = 40%, d = 40% and f = 67% (see appendix). A comparison of the observed vs. the expected proportions yielded: x2 = 2.03, df = 5, P > 0.84.