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प्रश्न
Explain Geographical Isolation
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उत्तर
Geographical isolation (Physical isolation):
- It occurs when an original population is divided into two or more groups by geographical barriers such as rivers, oceans, mountains, glaciers, etc.
- These barriers prevent interbreeding between isolated groups. The separated groups are exposed to different kinds of environmental factors and they acquired new traits by mutations.
- The separated populations develop distinct gene pools and do not interbreed. Thus, new species have been formed by geographical isolation. e.g. Darwin’s Finches.
संबंधित प्रश्न
Short answer question.
Enlist the different factors that are responsible for changing gene frequency.
The total genetic information encoded in sum total of genes in a Mendelian population is called ______.
Which is TRUE for industrial melanism?
Which of the following phenomena results in genetic recombination?
The structural, morphological change chromosome due to rearrangement is called ____________.
Black colored form became dominant over the light colored form in England during industrial revolution after 1845. This can be owed to ______.
What is a small interbreeding group of population called?
Domestic wheat, which has 42 chromosomes, is probably hexaploid (6n), whereas the haploid number in the ancestral ones was 7. Find out the right reason as to how are such plants produced?
Define the term:
Genetic drift
Define the term Chromosomal aberrations.
