In quantitative inheritance, if genotypes representing the extreme limits of the phenotypic expression are crossed, the F1 displays characteristics mid-way between the extremes. When the F1 are selfed, the nature of the binomial distribution reveals itself as long as selection pressures do not favor a particular phenotype over another. If they do, then the binomial distribution becomes skewed either to the maximum phenotype or minimum phenotype and assumes a Poisson distribution. For further details concerning the statistical analysis of quantitative characteristics, the student is referred to the STATISTICS section of the stack. For more information concerning quantitative inheritance, flip to the next card.