What does the statistical nature of the laws of inheritance of features mean? Prove that with a very large number of crosses

What does the statistical nature of the laws of inheritance of features mean? Prove that with a very large number of crosses, the ratio of plants with different parental characters in the experiment will almost correspond to the theoretical calculation?

The larger the number of offspring formed as a result of crossing, the closer they have the ratio of different parental characteristics in the experiment to the theoretical calculation.

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