AP BIOLOGY

Detailed explanation-1: -When genes are close together on the same chromosome, they are said to be linked. That means the alleles, or gene versions, already together on one chromosome will be inherited as a unit more frequently than not.

Detailed explanation-2: -During meiosis, chromosomes are recombined, resulting in gene swaps between homologous chromosomes. If genes are close together, the chances of being recombined are higher than if they are far away from each other. It is impossible for linked genes to be on different chromosomes.

Detailed explanation-3: -The answer to this question came just seven years later, when Thomas Hunt Morgan used fruit flies to demonstrate that linked genes must be real physical objects that are located in close proximity on the same chromosome.