Download App

Principles of Inheritance and Variation — BIOLOGY STD 12 Science — Question

Rajasthan BoardEnglish MediumSTD 12 ScienceBIOLOGYPrinciples of Inheritance and Variation1 Mark
MCQ
Polyploidy can be induced by the application of:
  • A
    Auxin
  • B
    Kinetin
  • C
    Colchicine
  • D
    Ethylene
✓

Answer

  1. Colchicine

Explanation:

A. Auxin is plant hormone that promotes cell elongation, apical dominance, root initiation, prevents abscission and induces parthenocarpy.

B. Kinetin is a cytokinin, a plat hormone that promotes cell division, delays senescence, promotes lateral bud development in dicots and promotes chloroplast development.

C. Colchicine is a chemical that arrests the spindle fibre formation during cell division. As a result, chromosomes do not separate and ploidy level of the cell increases.

-D. Ethylene is a gaseous plant hormone which causes fruit ripening.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "M.C.Q (0.5 Marks)" from Principles of Inheritance and Variation→Principles of Inheritance and Variation — all question types→BIOLOGY STD 12 Science question papers→Rajasthan Board STD 12 Science question papers→Rajasthan Board question paper generator→

Similar questions

Which of the following contributes an increase in population density?
→
In a bisexual flower inspite of the young stamens being removed artificially, the flower produces fruit. Choose a suitable explanation for the above situation.
→
The microspore tetrad of angiosperm at the time of formation, are surrounded by a callose wall. Breakdown of this wall is brought about by the enzyme callase synthesized by the
→
Soil fertility is reduced by:
→
The term Niche for a species is related to -
→
ABO blood group system is due to
→
The material for organic evolution is:
→
Mating of an organism to a double recessive in order to determine whether it is homozygous or heterozygous for a character under consideration, is called
→
The first mammals were like ...$A$... Their fossils are small sized. Mammals were ...$B$... and protected their unborn young inside the mother's body

Choose the correct option for $A$ and $B$ to complete the given $NCERT$ statement

→
In ecotone which species become abundant?
→