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प्रश्न
Define the term:
Genetic drift
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उत्तर
Any random fluctuation (alteration) in allele frequency, occurring in the natural population by pure chance, is called genetic drift.
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संबंधित प्रश्न
Give any ‘two’ factors responsible for genetic variation.
Overproduction is the principle of
(A) Lamarckism
(B) Theory of organic evolution
(C) Panspermia theory
(D) Modern theory of evolution
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?
Explain Geographical Isolation
All are post zygotic barriers, EXCEPT
Match the columns and choose the correct option.
| Column I | Column II | ||
| i. | Ecological isolation | a. | Sexually mature at different times of the year |
| ii. | Ethological isolation | b. | Specific mating behaviours |
| iii. | Mechanical isolation | c. | Difference in structure of mating organs |
| iv. | Seasonal isolation | d. | Same geographic region but separate habitat |
Which of the following phenomena results in genetic recombination?
Black colored form became dominant over the light colored form in England during industrial revolution after 1845. This can be owed to ______.
Ethological isolation is due to differences in ______
Write short note on Gene pool.
