I have a hard time with this question :(?

Question

Why genes located in one chromosome are said to be linked and why do linked genes sometimes separate during meiosis?

Answer 1

Genetic linkage occurs when particular genetic loci or alleles for genes are inherited jointly. Genetic loci on the same chromosome are physically connected and tend to segregate together during meiosis, and are thus genetically linked. Alleles for genes on different chromosomes are usually not linked, due to independent assortment of chromosomes during meiosis.

If two genes are far apart on the chromosome, they may get separated by crossing-over.