KCET 2026 Biology Answer Key- Download PDF

KCET Questions

• 1.

  The gene for haemophilia is located on 'x' chromosome. Hence it is normally impossible for a:
  

  • haemophilic father to pass the gene to his daughter
    
  • carrier mother to pass the gene to her daughter
    
  • carrier mother to pass the gene to her son
    
  • haemophilic father to pass the gene to his son
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• 2.

  In apple, the chromosome number of gametes is 17. What is the chromosome number in its Primary Endosperm Nucleus (PEN)?
  

  • 51
    
  • 34
    
  • 68
    
  • 17
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• 3.

  Select the plant species, where emasculation is not required for artificial hybridisation experiment.
  

  • Castor
    
  • Maize
    
  • Papaya
    
  • Wheat
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• 4.

  Identify the correct statement.
  

  • Only one megaspore present towards chalazal end remains functional.
    
  • 3 megaspores present towards chalazal end degenerate gradually.
    
  • Each megaspore mother cell directly develops into a megaspore.
    
  • Each female gametophyte is 7-celled and 7-nucleated structure.
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• 5.

  If a colour-blind female marries a man whose mother was also colour blind, what are the chances of her progeny having colour blindness?
  

  • 100%
    
  • 25%
    
  • 50%
    
  • 75%
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• 6.

  In the following pedigree chart, the mutant trait is shaded black. The gene responsible for the trait is:
  

  

  • dominant and sex-linked
    
  • dominant and autosomal
    
  • recessive and sex-linked
    
  • recessive and autosomal
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