Geoff G. answered 06/11/21
Extensive Experience Editing and Proofreading Formal Papers
The easiest way for you to solve this would be to make a 2 X 2 table. Along the top you'd have H-h (H is the tall dominant allele, h is the short recessive) and you'd have the same thing along the left side because both of the parents are heterozygous. Now fill in the four cells of the table with the corresponding letters.
H h
H
h
H h
H HH Hh
h Hh hh
You would get HH, Hh, Hh, and hh. Those are your genotypes. Knowing that H is dominant over h, it's now a simple matter to determine the phenotypes.