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What is a gene?

Updated: 8/11/2023
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6y ago

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GeneThe central dogma of genetics was that one gene coded for one enzyme this was later altered to one gene coded for one polypeptide.

As we learn more about genetics, this begins to look like an overly simplistic view of the concept of gene. The exact definition of the term gene is in debate at the moment, as is the use of the term at all in the future. The discovery of very short RNA's (miRNA, siRNA's) which influence gene expression (without translation into peptides) are part of this debate.

Definitions

A gene is a unit of heredity in a living organism. It is normally a stretch of DNA that codes

for a type of protein or for an RNA chain that has a function in the organism. All proteins and functional RNA chains are specified by genes. All living things depend on genes. Genes hold the information to build and maintain an organism's cells and pass genetic traits to offspring. A gene is a unit of in a living organism. It is normally a stretch of DNA that codes for a type of protein or for an RNA chain that has a function in the organism.

Genes hold the information to build and maintain an organism's cells and pass genetic traits to offspring. A gene is a part of a DNA molecule that codes for a particular trait of an organism. It provides instructions on how to make a polypeptide. For example, one gene may code for the production of tyrosinase, which is an enzyme (protein) used in the synthesis of melanin (a pigment responsible for dark colors in skin and fur).

By the traditional definition, a gene is 'transcribed' into mRNA which is then 'translated' into a protein, which will produce the desired effect in an organism's cell. Some genes may contain instructions for the production of RNA that is not translated into a protein, such as tRNA, rRNA, miRNA and siRNA.

Conclusion

In essence, a gene is a section of a DNA molecule that has a unique and specific biological function.

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6y ago
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Ryan Utaji

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4y ago

a unit of heredity which is transferred from a parent to offspring and is held to determine some characteristic of the offspring.

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9y ago

Gene is biological unit of inheritance . It has been defined variously as a unit of function , a unit of structure , as a unit of crossing over or recombination and so on . Concise definition of gene is part of DNA that encodes a polypeptide chain . A gene (DNA ) consists of two polynucleotide chins out of which only one is transcribed to form RNA. that forms proteins .

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9y ago

A gene is a thing that is part of your body. It is heredity from the parent to the child.

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9y ago

A gene is a hereditary molecule in a living organism.

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