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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
One of the parents of a cross has mutation in its mitochondria. In that cross, that parent is taken as a male. During segregation of F2 progenies that mutation is found in ______.
Rate of mutation is affected by ______.
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 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 |
Who proposed the Mutation Theory of Evolution and in which year?
What is the classic example of a point mutation?
Which of the following is also called a 'gross mutation' or 'macro mutation'?
What is the primary mechanism by which UV radiation causes mutations?
Which human genetic condition is characterized by trisomy 21 and results from chromosomal mutation?
