Discussion
..................is used to study genetic diversity amongst the species.
Answer: A
PCR is used to study genetic diversity.
The polymerase chain reaction amplifies chosen stretches of DNA from tiny samples, and almost every molecular marker used to measure genetic diversity depends on it: RAPD, AFLP, microsatellites (SSRs) and DNA barcoding. Comparing the amplified fragments shows how much variation exists within and between populations and species.
RNA, mRNA and tRNA are kinds of molecule, not methods. Messenger RNA carries the code from DNA to the ribosome and transfer RNA brings amino acids to it; neither is a technique for measuring diversity.
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