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प्रश्न
Very short answer question.
If variation occurs in a population by chance alone and not by natural selection and brings a change in frequencies of an allele. What is it called?
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उत्तर
If the variation in a population occurs by chance alone and not by natural selection and brings about a change in frequencies of an allele, it is called genetic drift.
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संबंधित प्रश्न
Give any ‘two’ factors responsible for genetic variation.
Define the term gene flow.
State the following:
Theory of recapitulation
What is ‘gene flow’?
Long answer question.
By taking industrial melanism as one example. Explain the concept of natural selection.
The change in gene and gene frequencies caused due to various aspects like mutation recombination and migration is called ______.
Which statements are TRUE regarding genetic recombination?
- It occurs in asexually and sexually reproducing organisms.
- They occur due to random union of gametes, anaphasic separation of chromosomes, and crossing over.
- New genetic combinations result in variation.
The movement of genes into or out of a population is known as ______.
Write short note on Gene pool.
Match the following
| Column A | Column B | ||
| (i) | Dryopithecus | (a) | Java and Peking |
| (ii) | Ramapithecus | (b) | Toung in South Africa |
| (iii) | Australopithecus | (c) | Lake Victoria of Africa |
| (iv) | Homo erectus | (d) | Shivalik hills in India |
