Question

Formula to determine phenotype with multiple alleles

Answer 1

I think this link would be helpful

Phenotypic ratio:  Make a list of all the different phenotypes (physical characteristics.

In you problem this would be:  Tall = 3, and short = 1.  The phenotypic ratio would therefore be 3 : 1

http://sctritonscience.com/Wilson/biology_punnett_squ