Question

What are the types of linkages?

Answer 1

There are three type of linkages:-
no linkage: the declaration refers to a unique object
internal linkage: all declarations in a compilation unit refer to the same object
external linkage: all declarations with external linkage in the program refer to the same object

Answer 2

Answer:

(i) Physical association of genes on a chromosome is called linkage.

(ii) Tightly linked genes show very low recombinations.

Example:-

Genes for white-eye colour and yellow body colour are very tightly linked and showed only 1.3 percent recombination in Drosophila.

(iii) Loosely linked genes show higher recombinations.

Example:-

Genes for white eye colour and miniature wing showed 37.2 percent recombination in Drosophila.