Watson and Crick worked out the structure of DNA molecules in 1952. Which of these would most likely happen thanks to the understanding of DNA structure? John Doe is convicted of speeding based on DNA evidence from police radar.
John Doe is convicted of murder based on DNA evidence found at the crime scene.
John Doe is convicted of bank robbery based on DNA evidence from dye on the money.
John Doe is convicted of shoplifting based on DNA evidence from a department store camera.

The correct answer would be C) gene expression.

Specialized cell refers to a differentiated cell which which performs specific function in the body. For example, RBC helps in transportation of oxygen and carbon dioxide in the body, nerve cell helps in transmission of electrochemical signals throughout the body et cetera.

Undifferentiated cell becomes specialized cell through gene expression.

Each cell in the body contains same genes; however, a particular set of gene is expressed in particular type of cell.

Consequently, different sets of proteins are formed which leads to formation of different types of cells.