Both parental type and recombinant types are observed to show that genes for the colour and genes for the shape of seeds segregate independently during gamete formation.
Detailed answer:
Morgan however observed the deviation in inheritance pattern in Drosophila with regard to this law : He observed that in Drosophila the F2 ratio in a dihybrid cross deviates significantly from 9 : 3 : 3 : 1 ratio. This is because the genes were linked. They are located on the same chromosome and therefore inherited together. Because of this the parental types observed in F2 generation were greater than the new recombinations. Linkage was not observed by Mendel because the characters which he had chosen were not linked as their genes are located on different chromosome and when on the same chromosome they were quite apart.
