Question

The probability of a cross-over occurring between two gene loci is proportional to ______.

विकल्प

• the activity of the two loci

• the distance between the two loci

• how far the loci are from the centromere

• how tightly the chromosomes are packed in the nucleus

Answer 1

The probability of a cross-over occurring between two gene loci is proportional to the distance between the two loci.

Explanation:

The probability of a crossover event occurring between two gene loci on a chromosome is directly proportional to the physical distance between those loci. Genes that are farther apart have a higher chance of recombination because there is more opportunity for a crossover to occur between them during meiosis, breaking the linkage. This relationship forms the basis of genetic mapping, where recombination frequency is used to estimate distances between genes on a chromosome.