Gene | Definition, Structure, Expression, & Facts | Britannica
网页3 天之前 · 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.
Gene - Wikipedia
网页The vast majority of organisms encode their genes in long strands of DNA (deoxyribonucleic acid). DNA consists of a chain made from four types of nucleotide subunits, each composed of: a five-carbon sugar (2-deoxyribose), a phosphate group, and one of the four bases adenine, cytosine, guanine, and thymine. [ 51 ]: 2.1.
What is a gene? - MedlinePlus
网页2024年5月21日 · 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.
Genes: Function, makeup, Human Genome Project, and research
网页2024年1月11日 · What are genes? Genes are strands of DNA that contain the biological instructions for life. Each gene contains sequences that determine physical and biological traits. Medical illustration by...
Gene - Definition and Examples - Biology Dictionary
网页2020年10月27日 · A gene is an extremely specific sequence of nucleotide monomers that has the ability to completely or partially control the expression of one or more traits in every type of living organism. Genes are formed from deoxyribonucleic acid (DNA) and, in the case of some viruses, ribonucleic acid (RNA) polymers.
Gene
网页2 天之前 · 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. Most genes code for specific proteins, or segments of proteins, which have differing functions within the body.
What Are Genes, DNA, and Chromosomes? - Verywell Health
网页2024年8月22日 · Genes, DNA, and chromosomes make up the human genome. Learn the role they play in genetics, inheritance, physical traits, and your risk of disease.
Genes - National Geographic Society
网页2023年10月19日 · A gene is a section of a long molecule called deoxyribonucleic acid (DNA), or—in some viruses—a similar molecule called ribonucleic acid (RNA). DNA and RNA are made of building blocks called nucleotides. Each nucleotide is built around one of the four different subunits, called bases.
Home - Gene - NCBI
网页Gene. Gene integrates information from a wide range of species. A record may include nomenclature, Reference Sequences (RefSeqs), maps, pathways, variations, phenotypes, and links to genome-, phenotype-, and locus-specific resources worldwide.
Genetics | History, Biology, Timeline, & Facts | Britannica
网页2024年10月3日 · Genetics, study of heredity in general and of genes in particular. Genetics forms one of the central pillars of biology and overlaps with many other areas, such as agriculture, medicine, and biotechnology. Learn more about the history, biology, areas of study, and methods of genetics.