APPENDIX I 



EcosPECiES, V. Species. 



EcoTYPE, V. Species. 



Efhciency of a Method of Estimation, the quantity of Information 

 extracted from the data by the method, expressed as a fraction of 

 that extracted by maximizing the likehhood. v. Likchhood. 



Egg, a gamete speciahzcd for the storage of food, as opposed to a Sperm 

 which is speciahzed for mobihty and which fertihzes the egg. The 

 Female gamete. 



Elimination, v. Chromosome. 



Embryo Sac, the female gametophyte in the angiosperms. 



Endogamous Group, Mating Group. 



Endogamy, Inbreeding. McLennan 1865 



Endomixis, replacement of the macronucleus by a product of the micro- 

 nucleus, in Infusoria. Woodruff igij. Now beHeved to occur only at 

 Autogamy. Sonnehorn 1947. 



Endosperm, nutritive tissue developed within the embryo-sac of flowering 

 plants, from the fusion of one female nucleus with one or more 

 others, or with a male nucleus, or with both (hence 2x, ix, ^x, or 5.v). 



Environment, those conditions external, or antecedent, to an organism 

 which are related to its development. Its reaction with the genotype 

 determines the phenotype. 

 Genotypic Environment, the aggregate of all the genes considered 

 as acting on one or more of them. 



Epi genesis, the theory that new structures arise in the course of develop- 

 ment, as opposed to Preformation. Wolff ijsQ- 



Epistasy (Epistasis), the property of non-reciprocal conditioning of the 

 manifestation of one gene difference, said to be Hypostatic, by the 

 action of another, said to be Epistatic. Bateson 1907. 



Equational Exceptions, v. Exceptions. 



Equational Separation, v. Reductional Separation. 



Equatorial Plate, Metaphase Plate. 



Error, Sampling, the variance of a statistic arising from, and a function 

 of, die Hmited size of samples. 

 Error Variance, that arising from agents unrecognized or uncon- 

 trolled in the experiment with which the apparent effect of any 

 recognized agent, controlled or uncontrolled, must be compared. 

 Standard Error, v. Deviation. 



Estimation, Combined, the calculation of a statistic or statistics from 

 several sets of unlike data (e.^. backcross and F2 data) taken together. 

 Simultaneous Estimation, the calculation of two or more statistics 

 from data simultaneously. 



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