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The human genome project

Problem

The genome of male jack jumper ants consists of just one chromosome. The table below lists the different ways in which scientists sequenced this chromosome.
ApproachDescription
1Sequence the entire chromosome without differentiating between coding and non-coding regions
2Identify and sequence only non-coding regions
3Isolate mRNA and reverse transcribe to identify coding DNA regions
4Digest the chromosome into fragments and only sequence the smallest ones
Which of the above approaches were also used in the Human Genome Project (HGP)?
Choose 2 answers: