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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
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 |
What is Isolation?
What is Genetic variations?
The total genetic information encoded in sum total of genes in a Mendelian population is called ______.
The change in gene and gene frequencies caused due to various aspects like mutation recombination and migration is called ______.
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 |
Which is TRUE for industrial melanism?
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.
Identify the INCORRECT statement.
Mention the name of a sterile animal produced by intergeneric hybridisation.
