Question:

Gene which suppresses other gene?? activity but does not lie on the same locus is called as

Updated On: Jul 28, 2022
  • epistatic
  • supplementary
  • hypostatic
  • codominant
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The Correct Option is A

Solution and Explanation

The phenomenon by which a gene suppresses the phenotypic expression of a nonallelic gene is called epistasis. Gene or locus which is suppressed by the presence of nonallelic gene is termed as hypostatic gene. The alleles which do not show dominant recessive relationship and are able to express themselves independently when present together are called codominant alleles. Supplementary genes are a pair of nonallelic genes, one of which produces its effect independently in the dominant state while the dominant allele of the second gene is without any independent effect but is able to modify the effect of the former to produce a new trait.
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Structure of DNA and RNA

DNA Structure:

Human DNA is unique and is made up of 3 billion base pairs. However, 99% of them are the same in all humans. The sequence of these bases determines what information needs to be coded that is necessary for the organism's growth and development. During the process of transcription (when DNA is replicated), a product is formed known as RNA (Ribonucleic Acid). This RNA is responsible for translating genetic information from DNA to protein followed by reading through ribosomes. 

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The ribonucleic acid has all the components same to that of the DNA with only 2 main differences within it. RNA has the same nitrogen bases called the adenine, Guanine, Cytosine as that of the DNA except for the Thymine which is replaced by the uracil. Adenine and uracil are considered as the major building blocks of RNA and both of them form base-pair with the help of 2 hydrogen bonds.

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