Explanation

W Bateson (1905) explained the lack of independent assortment in sweet pea and T H Morgan (1910) in ݌݋ݏ݋ݎܦℎ݈݅ܽ due to linkage. When genes closely present adhere or link together in a group and transmitted as a single unit, the phenomenon is called linkage. It stops the process of independent assortment. Incomplete linkage is broken down due to the crossing over.