Hereditary & Evolution

15 Questions

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Hereditary & Evolution

Time: 30 Minute


Questions and Answers
  • 1. 
    A cross between two individuals results in a ration of 9 : 3 : 3 : 1 for four possible phenotypes of progeny. This is an example of a:
    • A. 

      Dihybrid cross

    • B. 

      Monohybrid cross

    • C. 

      Test cross

    • D. 

      None of these

  • 2. 
    A normal cell of human body contains 23 pairs of chromosomes. The numbers of chromosomes in a sex cell (sperm or ovum) of a human being is most likely to be:
    • A. 

      46

    • B. 

      23

    • C. 

      21

    • D. 

      42

  • 3. 
    • A. 

      Simple dominant and recessive traits

    • B. 

      Incomplete dominant traits

    • C. 

      Co-dominant traits

    • D. 

      Sex-linked traits

  • 4. 
    • A. 

      IA IA and IB IO

    • B. 

      IA IB and IB IO

    • C. 

      IA IO and IB IO

    • D. 

      IA IB and IA IO

  • 5. 
    What will be the number of chromosomes present in each gamete produced by the plants if the palisade cells of a species of plant contain 28 chromosomes in all?
    • A. 

      56

    • B. 

      28

    • C. 

      14

    • D. 

      4

  • 6. 
    The following results were obtained by a scientist who crossed the F1 generation of pure-breeding parents for round and wrinkled seeds. From these results, it can be concluded that the actual number of round seeds he obtained was:
    • A. 

      1881

    • B. 

      22572

    • C. 

      2508

    • D. 

      5643

  • 7. 
    A cross between a tall plant (TT) and short plant (tt) resulted in progeny that were all tall plants because:
    • A. 

      Tallness is the dominant trait

    • B. 

      Shortness is the dominant trait

    • C. 

      Tallness is the recessive trait

    • D. 

      Height of plant is not governed by gene t or t

  • 8. 
    In peas, a pure tall plant (TT) is crossed with a pure short plant (tt). The ratio of pure tall plants to pure short plants in F2 generation will be:
    • A. 

      1 : 3

    • B. 

      3 : 1

    • C. 

      1 : 1

    • D. 

      2 : 1

  • 9. 
    In human males all the chromosomes are paired perfectly except one. These unpaired chromosomes are: (i) Large chromosome (ii) Small chromosome (iii) Y chromosome (iv) X chromosome
    • A. 

      (i) and (ii)

    • B. 

      (iii) and (ii)

    • C. 

      (iii) and (iv)

    • D. 

      (ii) and (iv)

  • 10. 
    Which of the following determines the sex of a child?
    • A. 

      The length of the mother’s pregnancy

    • B. 

      The length of time between ovulation and copulation

    • C. 

      The presence of an X chromosome in an ovum

    • D. 

      The presence of a Y chromosome in a sperm

  • 11. 
    Which is the one characteristic of the parents that can be inherited by their children?
    • A. 

      Deep scar on chin

    • B. 

      Snub nose

    • C. 

      Technique of swimming

    • D. 

      Cut nose

  • 12. 
    What could be the reason for the fossil of an organism to be found in the deeper layers of earth?
    • A. 

      The extinction of organism has occurred recently

    • B. 

      The extinction of organism has occurred thousands of years ago

    • C. 

      The fossil position in the layers of earth is not related to its time of extinction

    • D. 

      Time of extinction cannot be determined

  • 13. 
    • A. 

      Reptiles have evolved from birds

    • B. 

      There is no evolutionary connection between reptiles and birds

    • C. 

      Feathers are homologous structures in both the organisms

    • D. 

      Birds have evolved from reptiles

  • 14. 
    Which kind of organs present in two organisms indicates that they are derived from the same ancestor?
    • A. 

      Analogous Organs

    • B. 

      Respiratory Organs

    • C. 

      Digestive organs

    • D. 

      Homologous Organs

  • 15. 
    • A. 

      Forelimbs in humans and lizard

    • B. 

      Forelimbs in lizard and frog

    • C. 

      Wings in butterfly and bat

    • D. 

      Wings in bat and bird