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Consider the following statements with respect to genetic Mutation : 1. It is an alteration in the genetic material of a cell of a living organism or of a virus. 2. It cannot be transmitted to the cell’s or the virus’s descendants. 3. Mutations can result from exposure to high-energy electromagnetic radiation. Which of the statements given above is/are correct?

Consider the following statements with respect to genetic Mutation : 1. It is an alteration in the genetic material of a cell of a living organism or of a virus. 2. It cannot be transmitted to the cell’s or the virus’s descendants. 3. Mutations can result from exposure to high-energy electromagnetic radiation. Which of the statements given above is/are correct? Correct Answer 1 and 3 only

The correct answer is 1 and 3 only.

In News-

  • India is affected by a coronavirus variant carrying two genetic mutations. It is being called ‘double mutation’ as both the mutations confer notable advantages to the virus. 
  • The new variant, called B.1.617, was initially detected in India with two mutations — the E484Q and L452R. 

Key Points

Genetic Mutation:

  • It is an alteration in the genetic material (the genome) of a cell of a living organism or of a virus that is more or less permanent and that can be transmitted to the cell’s or the virus’s descendants. Hence statement 1 is correct
  • Mutation in the DNA of a body cell of a multicellular organism (somatic mutation) may be transmitted to descendant cells by DNA replication and hence result in a sector or patch of cells having an abnormal function, an example being cancer. Hence statement 2 is incorrect
  • Mutations result either from accidents during the normal chemical transactions of DNA, often during replication, or from exposure to high-energy electromagnetic radiation (e.g., ultraviolet light or X-rays) or particle radiation or to highly reactive chemicals in the environment. Hence statement 3 is correct
  • Because mutations are random changes, they are expected to be mostly deleterious, but some may be beneficial in certain environments.

Related Questions

Consider the following statements.
1. Hugo de Vries gave the Mutation Theory to explain the mechanism of evolution.
2. Mutations are discontinuous variations and are also called Saltatory Variation.
3. Mutations are the ultimate source of organic variations.
Which of the statements given above is/are correct about mutation?
Which of the following statements about living and non-living being is/are correct? 1. While living being can demonstrate growth and repair, non-living being cannot. 2. While living being demonstrates metabolic processes, non-living being does not. Select the correct answer using the code given below.
Which of the following statements are true?  a) Transaction exposure is inherent in all foreign currencies denominated contractual transactions  b) Translation exposure relates to the change in accounting income and balance sheet statements caused by change in exchange rate  c) Economic exposure has an impact on the valuation of a firm  d) Operating exposure does not have any impact on the firm's future operating revenues or future operating costs  Choose the correct option from those below: 
Consider the following statements regarding Mutation in genes: 1. Effects of mutation in somatic cells are observed in offspring whilst germ cells are not. 2. Chromosomal mutation may occur due to the absence of one or more chromosomes or some portion of it. Which of the statements given above is/are correct? 
In the question two statements are given, followed by two conclusions, I and II. You have to consider the statements to be true even if it seems to be at variance from commonly known facts. You have to decide which of the given conclusions, if any, follows from the given statements. Statement I: Some virus are living. Statement II: No living is a germ. Conclusion I: Some germs are virus. Conclusion II: All virus are germs.
Read the passage carefully and choose the best answer to each question out of the four alternatives. Genetic variation is the cornerstone of evolution, without which there can be no natural selection, and so a low genetic diversity decreases the ability of a species to survive and reproduce, explains lead author Yoshan Moodley, Professor at the Department of Zoology, University of Venda in South Africa. Two centuries ago, the black rhinoceros – which roamed much of sub Saharan Africa – had 64 different genetic lineages; but today only 20 of these lineages remain, says the paper. The species is now restricted to five countries, South Africa, Namibia, Kenya, Zimbabwe and Tanzania. Genetically unique populations that once existed in Nigeria, Cameroon, Chad, Eritrea, Ethiopia, Somalia, Mozambique, Malawi and Angola have disappeared. The origins of the 'genetic erosion' coincided with colonial rule in Africa and the popularity of big game hunting. From the second half of the 20th century, however, poaching for horns has dramatically depleted their population and genetic diversity, especially in Kenya and Tanzania.
Sub Sharan Africa has lost how many black rhino genetic lineages in 200 years?
Read the passage carefully and choose the best answer to each question out of the four alternatives. Genetic variation is the cornerstone of evolution, without which there can be no natural selection, and so a low genetic diversity decreases the ability of a species to survive and reproduce, explains lead author Yoshan Moodley, Professor at the Department of Zoology, University of Venda in South Africa. Two centuries ago, the black rhinoceros – which roamed much of sub Saharan Africa – had 64 different genetic lineages; but today only 20 of these lineages remain, says the paper. The species is now restricted to five countries, South Africa, Namibia, Kenya, Zimbabwe and Tanzania. Genetically unique populations that once existed in Nigeria, Cameroon, Chad, Eritrea, Ethiopia, Somalia, Mozambique, Malawi and Angola have disappeared. The origins of the 'genetic erosion' coincided with colonial rule in Africa and the popularity of big game hunting. From the second half of the 20th century, however, poaching for horns has dramatically depleted their population and genetic diversity, especially in Kenya and Tanzania.
Genetic diversity is proportional to _____________________.
In the following question, sentences of a paragraph have been jumbled and labelled as A, B, C, and D. You are required to rearrange the jumbled sentences of the paragraph and mark your response accordingly by selecting the correct option. A. As genome sequencing has become quicker and cheaper, those studies have become bigger and more complex. B. As a result, they comb through genomes in search of variations in DNA sequences and use statistical tools to determine whether those variations contribute to traits and diseases. C. Researchers clearly cannot intentionally introduce mutations into humans; instead, they must use what nature provides. D. Geneticists have long been able to introduce genetic mutations into model organisms such as the fruit fly — first with X-rays or chemicals, and now with more sophisticated gene-editing tools — where humans are concerned, the toolbox is more limited. 
Which of the following pairs are correctly matched ? A. Missense mutation - Substitution of one amino acid for another B. Nonsense mutation - The altéred DNA sequence is a stop codon C. Frame shift mutation - The subsequent amino acids are altered D. Silent mutation - There is no change in the DNA sequence
Consider the following statements:
1. The variation in an average annual range of temperature at 15° latitude of Southern Hemisphere is much less than that at 15° latitude of Northern Hemisphere.
2. At latitudes poleward of 35° the incoming radiation exceeds the outgoing radiation in. Northern Hemisphere, whereas in Southern Hemisphere the outgoing radiation exceeds the incoming radiation.
Which of the statements given above is/are correct?