Diabetics can now obtain insulin that has been manufactured by what biological advancement? HGP, hybridization, gene splicing or cloning

The answer to this question would be: gene splicing or cloning

First, the gene that makes insulin is cut from human cells. After having the insulin gene, the scientist will put it inside bacteria so the bacteria will produce human insulin. This was called gene splicing.

Then the bacteria have insulin genes, the bacteria will be cloned to make multiple colonies of same bacteria. This phase called cloning.