Cancer is a broad term used to describe a group of diseases characterized by the uncontrolled growth and spread of abnormal cells in the body.

A chromosome is a structure found in the cells of organisms that carries their genetic information.

DNA, also known as deoxyribonucleic acid, is a molecule that carries the genetic instructions used in the growth, development, functioning, and reproduction of all known living organisms and many viruses.

Down syndrome is a genetic disorder characterized by a distinct physical appearance, intellectual disability, and developmental delays.

"Human" is a Wikipedia page that explores the biological, social, and cultural aspects of human beings.

The Human Genome Project (HGP) was an international scientific research project with a goal to determine the sequence of nucleotide base pairs that make up human DNA, and to identify and map all of the genes of the human genome from both a physical and functional standpoint.

The X chromosome is one of the two sex chromosomes in humans, with females having two copies of it (XX) and males having one copy (XY).