You can use any letter you like, but select one that has a clearly different lower case, for example: Aa, Bb, Dd. Split the alleles for each parental type and add them into your Punnett square ...

You can use any letter you like but select one that has a clearly different lower case, for example: Aa, Bb, Dd. Split the alleles for each parental type and add them into your Punnett square ...

For example, "Xx Yy ZZ" and "XX YY zz" are valid input strings, while "XxYyZZ" or ""Xx Yy ZZ " (notice the space at the end...) is not. The program will then print a formatted Punnett square, and list ...