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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

You can do it
  1. Albinism in com plants is best described as
  2. DNA duplication occurs in
  3. The condition in which only one allele of a pair is present is known as
  4. Which one of the following chemical characteristics is not common to all living beings ?
  5. Linkage is
  6. The chromosomal theroy of heredity implies that
  7. When is the sex of an offspring decided
  8. The best method to determine whether an individual is homozygous or heterozygous is
  9. The nuclear membrane completely disappears during
  10. Transfer of a gene or genes through a virus is called
  11. Down's syndrome is an example of
  12. In a monohybrid cross the Fi ratio of a backcross is
  13. When two genes are situated very close to each other in a chromosome
  14. The possibilities of hereditary and evolutionary changes are greatest in species that reproduce by
  15. If an individual does not breed true for its characters, it is called
  16. An offspring of two homozygous parents different from one another by alleles at only one gene locus…
  17. The scientists who rediscovered the Mendel's laws are
  18. Base substitutions from base analogues I are called
  19. In the Operon concept, the regulator gene regulates chemical reactions in the cell by
  20. Which disease results from the genetic inability to synthesize a single enzyme ?
  21. The first person to induce mutations was
  22. Chromosomes exhibit minimum coiling during
  23. A child is bom with an extra chromosome in each of its cells. This is usually the result of
  24. A giant chromosome having many chromo-nemata lying side by side all along their length is called
  25. Linked genes may be separated by the process of
  26. Lethal genes are those which
  27. Mutations which are not dominant are not lost by a gene pooL This is known as
  28. Among the following which is a test cross?
  29. A codon is a sequence of 3 nucleolides on
  30.  A chemical mutagen is