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प्रश्न
Any random fluctuation in allele frequency, occurring in the natural population by pure chance is called __________.
विकल्प
gene pool
gene mutation
genetic recombination
genetic drift
उत्तर
Any random fluctuation in allele frequency, occurring in the natural population by pure chance is called genetic drift.
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संबंधित प्रश्न
Long answer question.
By taking industrial melanism as one example. Explain the concept of natural selection.
Write down the three main concepts of the modern synthetic theory.
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 |
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 |
Hybrids develop to maturity but become sterile due to failure of proper gametogenesis. This is a post mating barrier called ____________.
Which of the following phenomena results in genetic recombination?
Identify the method of reproductive isolation, when members of a population attain sexual maturity at different times preventing interbreeding.
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.
Define the term:
Genetic drift
