This example demonstrates what happens to the gene pool, so to speak, when a recessive allele is "defective" and lethal, meaning an entity with the recessive homozygous pairing would not be able to reproduce, or would not live long enough to reach reproductive age. We want to know what happens to the overall population in this case. We assume that the chances that a person inherits a dominant (or recessive) gene from a parent is given by the proportion of the total number of dominant (or recessive) alleles in the reproductive population at the previous stage to the total number of alleles in the reproductive population.
This model was converted from Stella to a Java applet using the Stella2Java conversion available on the Shodor Education Foundation web site.