This document outlines techniques in genetic engineering and biotechnology such as polymerase chain reaction (PCR), gel electrophoresis, and DNA profiling. It discusses how PCR is used to copy and amplify small amounts of DNA, how gel electrophoresis separates DNA fragments by size, and how DNA profiling determines paternity and is used in forensics. Additional topics covered include human genome sequencing, gene transfer between species using plasmids and restriction enzymes, examples of genetically modified crops, cloning techniques using differentiated cells, ethical issues around human therapeutic cloning, and definitions of terms like clone.