Genetics | History, Biology, Timeline, & Facts | Britannica
2024年12月19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 …
Gene | Definition, Structure, Expression, & Facts | Britannica
2024年12月7日 · 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 .
Human genetics | Description, Chromosomes, & Inheritance
Human genetics, study of the inheritance of characteristics by children from parents. Human inheritance does not differ in any fundamental way from inheritance in other organisms. An understanding of human heredity is important in the prediction, diagnosis, and treatment of diseases that have a genetic component.
genetics summary | Britannica
genetics, Study of heredity in general and of genes in particular. Modern genetics began in the 19th century with the work of Gregor Mendel, who formulated the basic concepts of heredity. In 1909 the word gene was coined by Wilhelm Johannsen, thus giving genetics its name.
Heredity | Definition & Facts | Britannica
2024年12月3日 · Every member of a species has a set of genes specific to that species. It is this set of genes that provides the constancy of the species. Among individuals within a species, however, variations can occur in the form each gene takes, providing the genetic basis for the fact that no two individuals (except identical twins) have exactly the same ...
DNA | Definition, Discovery, Function, Bases, Facts, & Structure ...
2024年12月15日 · DNA, organic chemical of complex molecular structure found in all prokaryotic and eukaryotic cells. It codes genetic information for the transmission of inherited traits. The structure of DNA was described in 1953, leading to further understanding of DNA replication and hereditary control of cellular activities.
Genetics - DNA, Genetic Code, Mutations | Britannica
2024年12月19日 · Genetics - DNA, Genetic Code, Mutations: A major landmark was attained in 1953 when American geneticist and biophysicist James D. Watson and British biophysicists Francis Crick and Maurice Wilkins devised a double helix model for DNA structure.
genetics - Kids | Britannica Kids | Homework Help
Genetics is the study of heredity, or how certain features pass from parents to their offspring, or young. Every kind of plant and animal produces young of its own species, or type. The young resemble their parents.
Genetics - Breeding, DNA, Traits | Britannica
2024年12月19日 · Genetics - Breeding, DNA, Traits: Genetic techniques are used in medicine to diagnose and treat inherited human disorders. Knowledge of a family history of conditions such as cancer or various disorders may indicate a hereditary tendency to develop these afflictions.
Genetics - DNA, Heredity, Variation | Britannica
2024年12月19日 · Genetics - DNA, Heredity, Variation: Genetically diverse lines of organisms can be crossed in such a way to produce different combinations of alleles in one line. For example, parental lines are crossed, producing an F1 generation, which is then allowed to undergo random mating to produce offspring that have purebreeding genotypes (i.e., AA, bb ...
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