56. Number of chromosome in a normal human body cell is

1. 1. 43

   
   
   

   2. 44

   
   
   

   3. 45

   
   
   

   4. 46

   
   
   

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   NA

   Correct Option: D

   NA

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57. Sexual reproduction causes genetic variation because of

1. 1. Blending of genes

   
   
   

   2. Chromosomal changes

   
   
   

   3. Shuffling of genes

   
   
   

   4. All of these

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: D

   NA

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58. A colour blind person marry with a normal women, blindness is produced in their

1. 1. Son

   
   
   

   2. Daughter

   
   
   

   3. Son of their son

   
   
   

   4. Daughter of their daughter

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: D

   NA

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59. Gregor Johann Mendel is famous for

1. 1. Cell theory

   
   
   

   2. Mutation principle

   
   
   

   3. Law of heredity

   
   
   

   4. Heredity of acquired characters

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: C

   NA

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60. Gene are made up of

1. 1. DNA

   
   
   

   2. RNA

   
   
   

   3. DNA & RNA

   
   
   

   4. Protein

   
   
   

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1. View Hint View Answer Discuss in Forum

   NA

   Correct Option: A

   NA

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