CBSE  /  Class 10  /  Science  /  Heredity and Evolution

  • 1. 
    Human teeth and elephant’s tusk are

  • Analogous organs
  • Vestigeal organs
  • Homologous organs
  • Rudimentary organs

  • 2. 
    Independent inheritance of two separate traits, shape and colour of seeds in Mendel’s cross on pea plants resulted in a observable ratio of:

  • 3 : 1
  • 9 : 3 : 3 : 1
  • 1 : 1
  • 9 : 4 : 2 : 1

  • 3. 
    Which of these is not a vestigial organ in human beings?

  • Appendix
  • Wisdom tooth
  • Nictitating membrane
  • Gall bladder

  • 4. 
    Evolution of wild cabbage is an example of:

  • Artificial selection
  • Natural selection
  • Mutation
  • Genetic drift

  • 5. 
    The modern day Human species has evolved from its earliest ancestors who lived in:

  • Asia
  • Australia
  • Africa
  • China

  • 6. 
    Two pink coloured flowers on crossing resulted in 1 red, 2 pink and 1 white flower progeny. The nature of the cross will be

  • double fertilisation
  • self pollination
  • cross fertilisation
  • no fertilisation

  • 7. 
    Which of the following statement is incorrect?

  • For every hormone there is a gene.
  • For every protein there is a gene.
  • For production of every enzyme there is a gene.
  • For every molecule of fat there is a gene

  • 8. 
    If a round, green seeded pea plant (RR yy) is crossed with wrinkled, yellow seeded pea plant (rr YY), the seeds produced in F1 generation are

  • round and yellow
  • round and green
  • wrinkled and green
  • wrinkled and yellow

  • 9. 
    In human males all the chromosomes are paired perfectly except one. This/these unpaired chromosome is/are

  • (i) and (ii)
  • (iii) only
  • (iii) and (iv)
  • (ii) and (iv)

  • 10. 
    A zygote which has an X-chromosome inherited from the father will develop into a

  • boy
  • girl
  • X- chromosome does not determine the sex of a child
  • either boy or girl
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