Colour blindness is caused due to

A. deficiency of vitamic C

B. sex-linked abnormality

C. absence of rods in retina

D. absence of visual purple in retina

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  1. When two genes are situated very close to each other in a chromosome
  2. The condition in which only one allele of a pair is present is known as
  3. The science dealing with study of inheritance and variation is
  4. Transfer of a gene or genes through a virus is called
  5. Exhibition of superiority by a hybrid over both of its parents is called
  6. Among the following which is a test cross?
  7. The chromosomal theroy of heredity implies that
  8. Reverse transcription was discovered by
  9. Albinism in com plants is best described as
  10. The first person to induce mutations was
  11. Colour blindness is caused due to
  12. The genetic constitution of an organism is known as
  13. The scientists who rediscovered the Mendel's laws are
  14. The possibilities of hereditary and evolutionary changes are greatest in species that reproduce by
  15. Down's syndrome is an example of
  16. Base substitutions from base analogues I are called
  17. A pure tall pea plant was reared in a soil poor in nutrition and reached the size of a pure dwarf pea…
  18. In a monohybrid cross the Fi ratio of a backcross is
  19. If an individual does not breed true for its characters, it is called
  20. A codon is a sequence of 3 nucleolides on
  21. The segment of DNA which participates in crossing over is known as
  22. Linked genes may be separated by the process of
  23. Chromosomes exhibit minimum coiling during
  24. The number of characters investigated by Mendel was
  25. Which disease results from the genetic inability to synthesize a single enzyme ?
  26. Lethal genes are those which
  27. The best method to determine whether an individual is homozygous or heterozygous is
  28. Mutations which are not dominant are not lost by a gene pooL This is known as
  29. In the Operon concept, the regulator gene regulates chemical reactions in the cell by
  30. The nuclear membrane completely disappears during