Question

Crossing over often occurs during prophase. How could scientists use an easy to measure trait that is linked to the gene responsible for a certain genetic condition to locate the disease causing gene?

Answer 1

Crossing over is the phenomena of the exchange of the genetic material between the non sister chromatid of the homologous chromosomes. The crossing over results in the formation of recombinant progeny.

Linked traits are close to each other and present on the same chromosome. The linked traits that are very close to each other and will not separate by the process of crossing over. This information is used to locate the disease condition.