Question

The unit of linkage map is:
a. Centimetre
b. Morgan
c. Centimorgan
d. All of the above

Answer 1

Hint: The propensity of DNA classifications that are close to collection on an organelle called chromosome to be congenital together in the duration of the meiosis phase of sexual reproduction is termed as Genetic linkage. The two genetic indicators which are substantially close to each other are improbable to be detached onto dissimilar chromatids in the duration of the process of chromosomal crossover. Thus, it is said to be more connected than markers that are far at a distance.

Complete answer:
As we know the unit of measuring genetic linkage is a centimorgan. The distance in the middle of the chromosome locations for which the predictable typical number of overruling chromosomal borders in a single generation is 0.01. This is termed as one centimorgan. To infer distance along a chromosome, this unit is used. However, on the other hand, it is not a true physical distance.

The Morgan is a unit of contingent detachment in the middle of the genes on a chromosome. This unit is used in erecting genetic maps and it is equivalent to the distance for which the rate of recurrence of crossing over amid specific pairs of genes is 100 percent.

The centimeter is the unit of length which is equal to 0.01 meter in the metric system and the corresponding length of 0.3937 inches.

Hence, the correct answer is option (C).

Note: In a case where the two genes are located on the same chromosome, the fortuitous of a crossover producing re-combination in the middle of the gene is connected to the detachment between the two genes. In the duration of the process of meiosis, the frequency of crossover takes place between the non-sister chromatids of homologous chromosomes. Normally the distance of the genes is shown by linkage maps.