Scientific hypothesis is an idea that has been proven by a group and / or individual but has'nt been world wide and a scientific theory is already proven and accepted hypothesis.
The best explanation is that it occurs because most eukaryotic genes and their RNA transcripts have long non-coding stretches of nucleotides that are not translated.
The genotypes for seed shape are RR, RR, rR, and rR
For stem height they are Tt, Tt, tt, and tt
Hope this helps!