Genetic Engineering?

You would need an advanced degree in genetics or molecular biology to really pursue a career in genetic engineering.

A BS in biology, genetics, molecular biology, or biochemistry would be suitable to getting into an appropriate advanced degree program. I would avoid ecology and similar degrees (e.g. marine biology) if you really want to pursue genetic engineering, as those degrees will not prepare you for a genetics program.

Genetic engineering, also called genetic modification, is the direct manipulation of an organism's genome using biotechnology. New DNA may be inserted in the host genome by first isolating and copying the genetic material of interest using molecular cloning methods to generate a DNA sequence, or by synthesizing the DNA, and then inserting this construct into the host organism. Genes may be removed, or "knocked out", using a nuclease. Gene targeting is a different technique that uses homologous recombination to change an endogenous gene, and can be used to delete a gene, remove exons, add a gene, or introduce point mutations.