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प्रश्न
What is hybrid sterility?
उत्तर
Hybrids develop to maturity but become sterile due to failure of proper gametogenesis (meiosis). This is called hybrid sterility. e.g. Mule is an inter-generic hybrid that is sterile.
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संबंधित प्रश्न
Overproduction is the principle of
(A) Lamarckism
(B) Theory of organic evolution
(C) Panspermia theory
(D) Modern theory of evolution
According to Abiogenesis, life originated from
(1) Non-living matter
(2) Pre-existing life
(3) Oxygen
(4) Extra-terrestrial matter
Long answer question.
Describe the different types of reproductive isolations.
______ changes the genes rearrangement (order or sequence) resulting in variation.
The structural, morphological change chromosome due to rearrangement is called ____________.
Chromosomal aberration causing no loss or gain of gene complement of the chromosome is called ____________.
The modem synthetic theory of evolution does NOT include ____________.
Reproductive isolation does not occur due 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?
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 |
