@kmac03 you’re welcome. The equations for polygenetics are done the same way as a punnett square just on a larger scale depending on the trait and genes involved. For instance if you have 3 genes involved in one trait that’s 6 alleles and the probability of the expression of that trait changes exponentially depending on whether the parent genes are heterozygous (two different alleles) or homozygous (two of the same allele).
So an example of a heterozygous parent would be Aa Bb Cc. (Simplified example)
A homozygous parent would be AA BB CC or aa bb cc.(simplified example)
Most plants have sets of genes that are both homozygous and heterozygous so this is where things get real crazy.
For example parent 1 could be Aa bb CC and parent 2 could be aa BB Cc.
So let’s say to get the phenotype you want you need all 6 alleles to be dominant homozygous like AA BB CC and both parents are heterozygous Aa Bb Cc. Each gene has a 25% chance of expressing the homozygous trait desired. Now you take the percentage probability across each gene and multiply it. The end result you get roughly a 1.5% chance of having the desired phenotype you want in the stated example.