Thousands of daughter plants produced by micropropagation, are genetically identical and are called 

The thousands of daughter plants produced by micropropagation, which are genetically identical, are called somaclones.

Explants are small pieces of plant tissue used for micropropagation or tissue culture techniques to produce multiple copies of the same plant. These can be leaves, stems, or even just a few cells.

Mutants are organisms that have undergone a genetic mutation, resulting in a change in their DNA sequence that may alter their physical, biochemical or physiological properties. In biotechnology, mutants can be created through genetic engineering techniques.

Recombinants are organisms or cells that contain genetic material from two or more different sources, typically achieved through genetic engineering techniques such as gene splicing. The resulting DNA molecule is called a recombinant DNA molecule. It can also be formed by the process of crossing over during meiosis.