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Question
Variations caused due to mutations are ______.
Options
random and directionless
random and directional
random and small
random, small and directional
Solution
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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Match list I with list II.
| List I | List II | ||
| A. | A pair of chromosomes extra with diploid | (i) | monosomy |
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| List I | List II | ||
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