How much linkage is maximum in chromosomes?

The maximum amount of linkage between two genes on a chromosome is 50%, which occurs when the genes are completely linked. Complete linkage means that the two genes are so close together on the chromosome that they always appear together in gametes during meiosis and are inherited as a single unit. This situation typically arises when the genes are very close to each other on the chromosome and there is no crossing over between them during meiosis. As a result, the alleles of these genes are always inherited together and exhibit no recombination. However, complete linkage is relatively rare in natural populations, and most genes on a chromosome exhibit some degree of recombination and independent assortment during meiosis.