What is the common meaning of clone in biotechnology?

Correct answer: Genetically identical copies

The direct answer is A, genetically identical copies. In biotechnology, a clone is a cell, organism, or DNA molecule produced from one original unit and having the same or essentially the same genetic material. In gene cloning, a selected gene is inserted into a suitable vector, placed in a host, and copied as the host multiplies. Therefore the important idea is genetic sameness, not merely physical similarity. Option A is correct because it gives the standard meaning of clone. Option B is wrong because clones are not defined as always different organisms; difference is the opposite of the usual meaning. Option C is wrong because cells generally contain DNA, and absence of DNA does not create a clone. Option D is wrong because cloning concerns genetic copies and can involve living cells or organisms, not only dead tissue. Remember: one original genetic pattern producing matching copies is cloning.