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प्रश्न
Explain Geographical Isolation
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
Overproduction is the principle of
(A) Lamarckism
(B) Theory of organic evolution
(C) Panspermia theory
(D) Modern theory of evolution
State the following:
Theory of recapitulation
What is Isolation?
Any random fluctuation in allele frequency, occurring in the natural population by pure chance is called __________.
Which of the following phenomena results in genetic recombination?
After the industrial revolution in Great Britain in 1845 which of the following occurred?
Black colored form became dominant over the light colored form in England during industrial revolution after 1845. This can be owed to ______.
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?
Write short note on Gene pool.
Define the Transformation.
