Meselson and Stahl used “heavy” ________ in their replication studies because ________.

“Burning off” excess weight from Christmas cookies is an example of ________.

The ________ houses a eukaryotic cell’s genetic material.

Human ________ are named based on approximate size order.

Gene therapy can be used to introduce foreign DNA into cells ________.

Mutations that are ________ are considered to be fixed.

Identify the open system from the list below.

What is the difference between autosomes and sex chromosomes?

During G2 phase, the cell ________.

The structure that gives rise to the cell plate in plant cells is called a ________.