Question

Write a note on linkage.

Answer 1

Linkage. (Science: genetics) tendency for two or more non-allelic genes to be inherited together, because they are located more or less closely on the same chromosome.

Answer 2

Answer:

(1) Linkage is the tendency of genes to be inherited together because they are present in the same chromosome.

(2) All the genes on a chromosome are linked to one another. In the linkage group some of the genes are included.

3) The number of linkage groups of a particular species corresponds to its haploid number of chromosomes present in the organism.

(4) In human beings, there are 23 linkage groups which correspond to the pairs of chromosomes found in each cell.

(5) Linkage groups can be separated only at the time of crossing over during meiosis. The linkage group can form a new combination of genes after crossing over.

(6) Linkages are of two types, viz, complete linkage and incomplete linkage.

(7) Morgan discovered linkage in animals while Bateson and Punnett discovered it in plants.