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प्रश्न
Higher Order Thinking Skill (HOT)
Polyploids are characterised by gigantism. Justify your answer.
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उत्तर
An organism having more than two set of chromosome is called polyploidy. It can be induced by physical agents such as heat or cold treatment, X-rays and chemical agents like colchicine. As organisms produced by polyploidy have more than two set of chromosomes they are gigantic.
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संबंधित प्रश्न
In a hexaploid wheat( 2n = 6 x = 42 ) the haploid (n) and the basic(x) number of chromosomes respectively are ______.
Economically important crop plants with superior quality are raised by ______.
______ is the chemical used for doubling the chromosomes.
The process of producing an organism with more than two sets of chromosome is called mutation.
In vitro fertilisation means the fertilisation done inside the body.
Assertion: Hybrid is superior than either of its parentsReason: Hybrid vigour is lost upon inbreeding.
Give the name of wheat variety having higher dietary fibre and protein.
Semi-dwarf varieties were introduced in rice. This was made possible by the presence of dwarfing gene in rice. Name this dwarfing gene.
Name three improved characteristics of wheat that helped India to achieve high productivity
Higher Order Thinking Skill (HOT)
‘P’ is a gene required for the synthesis of vitamin A. It is integrated with genome of ‘Q’ to produce genetically modified plant ‘R’.
- What is P, Q and R?
- State the importance of ‘R’ in India.
