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प्रश्न
What is ‘gene flow’?
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उत्तर
Gene flow is the introduction of genetic material from one population of its species to another by interbreeding. It brings a change in the composition of the gene pool of the receiving population. The introduction of new alleles through a gene pool for increased variability within the population.
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संबंधित प्रश्न
Very short answer question.
If variation occurs in a population by chance alone and not by natural selection and brings a change in frequencies of an allele. What is it called?
Short answer question.
Enlist the different factors that are responsible for changing gene frequency.
Long answer question.
Explain the different factors responsible for genetic variations.
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.
Black colored form became dominant over the light colored form in England during industrial revolution after 1845. This can be owed to ______.
Which statements are TRUE regarding genetic recombination?
- It occurs in asexually and sexually reproducing organisms.
- They occur due to random union of gametes, anaphasic separation of chromosomes, and crossing over.
- New genetic combinations result in variation.
Sewall Wright effect is ______
Which event is represented by the above diagram, related to chromosomal aberrations?
Match the following
| Column A | Column B | ||
| (i) | Dryopithecus | (a) | Java and Peking |
| (ii) | Ramapithecus | (b) | Toung in South Africa |
| (iii) | Australopithecus | (c) | Lake Victoria of Africa |
| (iv) | Homo erectus | (d) | Shivalik hills in India |
