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प्रश्न
Variations caused due to mutations are ______.
पर्याय
random and directionless
random and directional
random and small
random, small and directional
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उत्तर
Variations caused due to mutations are random and directionless.
Explanation:
Hugo de Vries proposed the mutation theory of evolution in 1901. According to the notion, evolution is a jerky process in which mutations (discontinuous variations) serve as the starting point for the formation of new types and species. Unexpected mutations start to show up. They start functioning right away. There are mutations in every imaginable direction. Therefore, "Random and directionless" is the right response.
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संबंधित प्रश्न
Answer the following question.
Two children, A and B aged 4 and 5 years respectively visited a hospital with a similar genetic disorder. The girl A was provided enzyme-replacement therapy and was advised to revisit periodically for further treatment. The girl, B was, however, given a therapy that did not require revisit for further treatment.
Name the ailments the two girls were suffering from?
Answer the following question.
Two children, A and B aged 4 and 5 years respectively visited a hospital with a similar genetic disorder. The girl A was provided enzyme-replacement therapy and was advised to revisit periodically for further treatment. The girl, B was, however, given a therapy that did not require revisit for further treatment.
Why did the treatment provided to girl A required repeated visits?
The point mutation sequence for transition, transition, transversion, and transversion in DNA are
A strong mutagen is:
Match list I with list II
| List I | List II | ||
| A. | A pair of chromosomes extra with diploid | i) | monosomy |
| B. | One chromosome extra to the diploid | ii) | tetrasomy |
| C. | One chromosome was lost from diploid | iii) | trisomy |
| D. | Two individual chromosomes lose from diploid | iv) | double monosomy |
Match list I with list II.
| List I | List II |
| A. A pair of chromosomes extra with diploid | i) monosomy |
| B. One chromosome extra to the diploid | ii) tetrasomy |
| C. One chromosome loses from diploid | iii) trisomy |
| D. Two individual chromosomes lose from diploid | iv) double monosomy |
Match list I with list II
| List I | List II |
| A. A pair of chromosomes extra with diploid | (i) monosomy |
| B. One chromosome extra to the diploid | (ii) tetrasomy |
| C. One chromosome loses from diploid | (iii) trisomy |
| D. Two individual chromosomes lose from diploid | (iv) double monosomy |
Who proposed the Mutation Theory of Evolution and in which year?
Which of the following is also called a 'gross mutation' or 'macro mutation'?
Which human genetic condition is characterized by trisomy 21 and results from chromosomal mutation?
