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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
Give any ‘two’ factors responsible for genetic variation.
State the following:
Theory of recapitulation
Define Population.
Long answer question.
Explain the different factors responsible for genetic variations.
What is Isolation?
Which theory provides explanation for both natural selection as well as mutation?
______ is the separation of the population of a particular species into smaller units which prevents interbreeding between them.
Which animal was very conspicuously visible on the tree trunks after the industrial revolution (1845) in Great Britain?
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?
Which of the following is a pre-mating mechanism of isolation?
