NEET BIOLOGY

Detailed explanation-1: -Crossing over is directly porportional to the recombination. More the crossing over, more the chances of exchange of gene and more is the new recombination formed. Hence, distance between gene has a direct relationship with percentage of recombination.

Detailed explanation-2: -Recombination frequency is directly proportional to the distance between the genes, while linkage is inversely proportional to it.

Detailed explanation-3: -The linkage is the tendency of closely placed genes on a chromosome to stay together during inheritance. The linkage is indirectly proportional to the distance between genes, the less the distance between the genes, the less is the cross over frequency between them and the more is the linkage frequency between them.

Detailed explanation-4: -It follows that: • the probability of a crossover between two genes is proportional to the distance between the two genes. That is, the greater the distance between the two genes, the greater the probability that a crossover will occur between them during meiosis.

Detailed explanation-5: -The greater the frequency of recombination (segregation) between two genetic markers, the further apart they are assumed to be. Conversely, the lower the frequency of recombination between the markers, the smaller the physical distance between them.