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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
Give two chromosomal similarities between man and apes.
The proportion of an allele in the gene pool to the total number of alleles at a given locus is called _______.
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 |
Which of the following is the CORRECT difference between genetic drift and natural selection?
Hybrids develop to maturity but become sterile due to failure of proper gametogenesis. This is a post mating barrier called ____________.
Physical isolation is also called ______.
Identify the INCORRECT statement.
The movement of genes into or out of a population is known as ______.
Sewall Wright effect is ______
What is reproductive isolation?
