Question

The blue green algae and bacteria contain.

• A. One linkage group
• B. Two linkage groups
• C. Three linkage groups
• D. None of the above

Answer 1

The correct option is A One linkage group

All the genes which are located on a single chromosome form one linkage group. The total number of linkage groups in an organism corresponds to the haploid number of chromosomes, i.e., to the number of chromosome pairs.

• Most bacteria have a genome that consists of a single DNA molecule (i.e., one chromosome).
  
• The blue-green algae is a cyanobacterium that possesses one chromosome.
  

So, the correct answer is 'One linkage group'.