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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
Overproduction is the principle of
(A) Lamarckism
(B) Theory of organic evolution
(C) Panspermia theory
(D) Modern theory of evolution
Long answer question.
By taking industrial melanism as one example. Explain the concept of natural selection.
Write down the three main concepts of the modern synthetic theory.
The change in gene and gene frequencies caused due to various aspects like mutation recombination and migration is called ______.
After the industrial revolution in Great Britain in 1845 which of the following occurred?
Chromosomal aberration causing no loss or gain of gene complement of the chromosome is called ____________.
Identify the INCORRECT statement.
Fertilization between opposite mating gametes leads to ______.
The movement of genes into or out of a population is known as ______.
Ethological isolation is due to differences in ______
