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प्रश्न
Define the term gene flow.
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उत्तर
Gene flow is the movement of genes into or out of a population. Gene movement may be in the form of migration of organism, or gametes or segments of DNA Gene flow also alters gene frequency, causing evolutionary change.
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संबंधित प्रश्न
Overproduction is the principle of
(A) Lamarckism
(B) Theory of organic evolution
(C) Panspermia theory
(D) Modern theory of evolution
The proportion of an allele in the gene pool to the total number of alleles at a given locus is called _______.
Which theory provides explanation for both natural selection as well as mutation?
Which of the following is TRUE for genetic drift?
Match the columns and choose the correct option.
| Column I | Column II | ||
| i. | Zygote mortality | a. | Hybrid develops to maturity but becomes sterile |
| ii. | Hybrid sterility | b. | Egg is fertilized but zygote dies |
| iii. | Gamete mortality | c. | Union of two gametes does not occur in the iven time |
After the industrial revolution in Great Britain in 1845 which of the following occurred?
Identify the method of reproductive isolation, when members of a population attain sexual maturity at different times preventing interbreeding.
Mention the name of a sterile animal produced by intergeneric hybridisation.
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 |
Define the term Chromosomal aberrations.
