Question

one parent is heterozygous dominant for dimples and the other parent is homozygous recessive.use the letter H and what is the percentage for dimples and no dimples?

Answer 1

H h
h Hh hh

h Hh hh

50% dimples 50% no dimples

Answer 2

Using a punnet square, 
    h    h 
H Hh Hh
h hh  hh 

The offspring will be 50% Heterozygous dominant and 50% homozygous recessive.