Genetics and Evolution – Multiple Choice Questions (MCQs)

1. 13. Which of the following is an example of point mutation?

   • A. Sickle cell anemia
   • B. Thalassemia
   • C. Color blindness
   • D. Phenylketonuria

2. 14. The genetic disorder 'Klinefelter's syndrome' is characterized by the genotype:

   • A. XXY
   • B. XO
   • C. XXX
   • D. XYY

3. 15. The 'connecting link' between reptiles and birds is:

   • A. Archaeopteryx
   • B. Peripatus
   • C. Euglena
   • D. Chlamydomonas

4. 16. Which of the following is a vestigial organ in humans?

   • A. Appendix
   • B. Eyelids
   • C. Lungs
   • D. Heart

5. 17. A sudden, heritable change in the genetic material is called:

   • A. Mutation
   • B. Recombination
   • C. Gene flow
   • D. Genetic drift

6. 18. If a colourblind man marries a woman who is a carrier for colour blindness, what is the probability of their son being colourblind?

   • A. 50%
   • B. 25%
   • C. 75%
   • D. 100%

7. 19. The concept of 'survival of the fittest' is part of:

   • A. Natural selection
   • B. Artificial selection
   • C. Mutation theory
   • D. Lamarckism

8. 20. The study of fossils is known as:

   • A. Paleontology
   • B. Embryology
   • C. Biogeography
   • D. Anatomy

9. 21. Down's syndrome is caused by trisomy of chromosome number:

   • A. 21
   • B. 18
   • C. 13
   • D. 5

10. 22. The technique of 'DNA fingerprinting' was developed by:

    • A. Alec Jeffreys
    • B. Francis Crick
    • C. James Watson
    • D. M.S. Swaminathan

11. 23. Which of the following is an example of incomplete dominance?

    • A. Flower color in Mirabilis jalapa
    • B. Blood groups in humans
    • C. Pea seed shape
    • D. Human skin color

12. 24. The most accepted theory of origin of life is:

    • A. Chemical evolution
    • B. Special creation
    • C. Panspermia
    • D. Spontaneous generation