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प्रश्न
What is Genetic variations?
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उत्तर
Genetic variation is the difference in DNA sequences between individuals within a population. Variation occurs in germ cells, i.e., sperm and egg, and also in somatic (all other) cells. Only variation that arises in germ cells can be inherited from one individual to another and so affect population dynamics, and ultimately evolution. Mutations and recombination are major sources of variation.
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संबंधित प्रश्न
Transfer of gene between the population that differ genetically from one another is called _____.
(A) Gene mutation
(B) Gene flow
(C) Genetic drift
(D) Genetic recombination
Define Population.
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?
Match the following:
| Column- I | Column- II |
| 1. August Weismann | a. Mutation theory |
| 2. Hugo de vries | b. Germplasm theory |
| 3. Charl Darwin | c. Theory of acquired characters |
| 4. Lamark | d. Theory of natural selection |
Long answer question.
By taking industrial melanism as one example. Explain the concept of natural selection.
Any random fluctuation in allele frequency, occurring in the natural population by pure chance is called __________.
The change in gene and gene frequencies caused due to various aspects like mutation recombination and migration is called ______.
Loss of gene from chromosome occurs due to ______
The modem synthetic theory of evolution does NOT include ____________.
Industrial melanism is one of the best example for ______.
