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Biology · 2023 · 3 marks
Biotechnology and its ApplicationsBiotechnological Applications in Agriculture3 marksUnderstandshort answer
CBSE 2023 · Region 5 · Set 1 · Q25
One of the major approaches of crop improvement programme is Artificial Hybridisation. Explain the steps involved in making sure that only the…
One of the major approaches of crop improvement programme is Artificial Hybridisation. Explain the steps involved in making sure that only the desired pollen grain pollinate the stigma of a bisexual flower by a plant breeder.
Marking-scheme solution
Emasculation : Removal of the anther from the flower bud before the anther dehisces.
Bagging : Covering the emasculated flower with a bag of suitable size to prevent contamination of its stigma with unwanted pollen.
Dusting of desired pollen on the stigma and re-bagging.
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CBSE Class 12 Biology past-paper question from the 2023 board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.