Dna copying mechanism is not absolutely accurate, they make the generation of variation a fairlyslow process. justify the statement.

according to my knowledge DNA replication or DNA copying is a fairly accurate process.

Explanation:

DNA replication is very accurate process because of the proofreading ability of the enzymes which join the incoming nucleotides. whenever a wrong nucleotide is placed the enzyme returns to the previous position and rectifies the error by excising the incorrect nucleotide and replacing it with the correct one. If the process of rectification is not performed this process could be very troublesome; can even cause cancer. hence, DNA variation is a very rare process. and makes the generation of variation time fairly slow.

"do a testcross with a homozygous recessive plant."

thats not even an aswer choice