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प्रश्न
Give any ‘two’ factors responsible for genetic variation.
Explain any two causes of genetic variation.
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उत्तर
Gene mutations, gene flow, genetic recombination, genetic drift, and chromosomal aberration are some factors or Causes responsible for genetic variation.
- Gene mutations: A sudden, permanent heritable change in DNA, such as a point mutation within a gene, leads to variations by altering the phenotype of an organism.
- Gene Flow: The movement of genes into or out of a population through migration, gametes, or DNA segments, which changes gene frequencies and contributes to genetic variation.
संबंधित प्रश्न
Define the term gene flow.
State the following:
Theory of recapitulation
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?
Long answer question.
Explain the different factors responsible for genetic variations.
What is Genetic variations?
All are post zygotic barriers, EXCEPT
Identify the INCORRECT statement.
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 |
____________ brings about evolutionary changes by favouring differential reproduction of genes.
Define the term:
Genetic drift
