The genes that are located close to each other on a chromosome have higher linkage ability. This means that it is very likely that those genes are going to be passed down to the next generation together. On contrary, the genes that are found on different chromosomes have a very small chance to be inherited together.
unlinked genes-genes on different chromosomes not so strongly linked genes- genes apart from each other,but on the same chromosome strongly linked genes- genes close to each other