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Question
Define the term gene flow.
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Solution
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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RELATED QUESTIONS
Give any ‘two’ factors responsible for genetic variation.
Overproduction is the principle of
(A) Lamarckism
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(C) Panspermia theory
(D) Modern theory of evolution
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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 |
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| (ii) | Ramapithecus | (b) | Toung in South Africa |
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