Question

Archaeologists unearthed a human skull with a small dried fragment of the scalp still attached. they extracted a tiny amount of dna from the scalp tissue. to obtain sufficient dna for an analysis of the ancient human's genes, they could _____.

Answer 1

They could amplify the DNA using a polymerase chain reaction. PCR involves the incubation of the same DNA with primers, DNA polymerase, and deoxyribonucleosides. With every cycle of the PCR, the amount of DNA in the solution doubles. Therefore, depending on how much DNA is required, the amount of PCR cycles can be set.