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प्रश्न
Variations caused due to mutations are ______.
विकल्प
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
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Albinism is known to be due to an autosomal recessive mutation. The first child of a couple with normal skin pigmentation was an albino. What is the probability that their second child will also be an albino?
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Which one of the following is a sort of chromosomal aberration?
Mutations result in
How does a mutagen induce mutation? Explain with example.
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 a diploid | iii) Trisomy |
| D. Two individual chromosomes lose their diploid | iv) Double chromosome |
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 |
