Gene - Wikipedia
We define a gene as a DNA sequence that is transcribed. This definition includes genes that do not encode proteins (not all transcripts are messenger RNA). The definition normally excludes regions of the genome that control transcription but are not themselves transcribed.

What Is a Gene? - Cleveland Clinic
Genes are segments of DNA that give your cells instructions for specific traits or body functions. Different versions of the same gene are called alleles.

Gene | Definition, Structure, Expression, & Facts | Britannica
gene, unit of hereditary information that occupies a fixed position (locus) on a chromosome. Genes achieve their effects by directing the synthesis of proteins. In eukaryotes (such as animals, plants, and fungi), genes are contained within the cell nucleus.

What Is Genetics? - National Institute of General Medical Sciences
A gene is a segment of DNA that contains instructions for building one or more molecules that help the body work. Researchers estimate that humans have about 20,000 genes, which account for about 1 percent of our DNA.

Genetics Basics | Genomics and Your Health | CDC
Genes are specific sections of DNA that have instructions for making proteins. Proteins make up most of the parts of your body and make your body work the right way. You have two copies of every gene. You inherit one copy from your father and one copy from your mother.

Gene
The gene is considered the basic unit of inheritance. Genes are passed from parents to offspring and contain the information needed to specify physical and biological traits.

What is a gene?: MedlinePlus Genetics
What is a gene? A gene is the basic physical and functional unit of heredity. Genes are made up of DNA. Some genes act as instructions to make molecules called proteins, which are needed for the body to function. However, many genes do not code for proteins, instead they help control other genes.

Definition of gene - NCI Dictionary of Genetics Terms
Genes are made up of sequences of DNA and are arranged, one after another, at specific locations on chromosomes in the nucleus of cells.

What are DNA and Genes?
Contained within the 3 billion letters of the human genome are about 21,000 genes. Most of our known genes code for proteins, but some code for RNA molecules. All humans have the same genes arranged in the same order. And more than 99.9% of our DNA sequence is the same.