Sensory clones per ear | Observed (O) | Expected (E) |
---|---|---|

0 | 35 | 32.9 |

1 | 29 | 29.2 |

2 | 9 | 13.0 |

≥3 | 7 | 4.9 |

This analysis tested the hypothesis that the presumed clones did result from single infection events following the Poisson distribution as described by Ryder and Cepko (1994). These data are consistent with the hypothesis with 0.50 >

*p*> 0.25 for 2 df using the χ^{2}test for goodness of fit. μ = total number of infection events per total number of embryos (71/80 = 0.888).*P(x)*= probability of*x*infection events occurring in one embryo = exp .*F(x)*= frequency of*x*infection events occurring in one embryo in a data set of 80 embryos. E = expected value of*F(x)*=*P(x)**80. O = observed value of*F(x).**Note:*Because the parameter used to derive μ was based on the sample data itself, it is necessary to subtract an additional degree of freedom from the number of categories (*k*= 4), leaving 2 df.