In the genetic many other methods analysis are used:

ontogenetic,

immunogenetic,

comparative morphological,

comparative biochemical methods,

various mathematical methods, etc.

Deviations of phenotypic classes numerical rations in the splitting from typical ones and their causes

1. Establishing of offspring phenotypic classes numerical rations variations caused by

1. statistical reasons,

2. the differential mortality (lethal genes),

3. incomplete expression of genes,

4. genes interaction.

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