The alleles for tall height in pea plant is dominant over short height. why do you always know the genotype of a short plant but not the genotype of a tall plant ?

you always know the genotype of a short plant because it always has a small allele but the genotype for a tall could be Tt or TT

      x/140 = 25/100

we need to find the x to find the x multiply 140 and 25

and what do you get 3500.   and what is 3500 divided by 100

= 35

answer; the above statement is (true);