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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

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  1. The best method to determine whether an individual is homozygous or heterozygous is
  2. A giant chromosome having many chromo-nemata lying side by side all along their length is called
  3. Which disease results from the genetic inability to synthesize a single enzyme ?
  4. Transfer of a gene or genes through a virus is called
  5. Klinefelter's syndrome is developed when the chromosome in male is
  6. How many meiosis will be required to produce 102 pollen-grains ?
  7. Reverse transcription was discovered by
  8. The number of characters investigated by Mendel was
  9. The possibilities of hereditary and evolutionary changes are greatest in species that reproduce by
  10. Chromosomes exhibit minimum coiling during
  11. Some people experience PTC paper on tongue as bitter, others as tasteless. This character is hereditary…
  12. Linkage is
  13. Mutations which are not dominant are not lost by a gene pooL This is known as
  14. Down's syndrome is an example of
  15. An offspring of two homozygous parents different from one another by alleles at only one gene locus…
  16. The crossing of a homozygous tall plant with a dwarf would yield plants in the ratio of
  17. When two genes are situated very close to each other in a chromosome
  18. Linked genes may be separated by the process of
  19. Albinism in com plants is best described as
  20. The genetic constitution of an organism is known as
  21. Dyad is
  22. A functional unit of a gene which specifies synthesis of one poly-peptide is known as
  23. DNA duplication occurs in
  24. In humans, an example of sex-linked trait is
  25. A child is bom with an extra chromosome in each of its cells. This is usually the result of
  26. Among the following which is a test cross?
  27. The condition in which only one allele of a pair is present is known as
  28. Exhibition of superiority by a hybrid over both of its parents is called
  29. The term 'meiosis' was coined bv
  30. A pure tall pea plant was reared in a soil poor in nutrition and reached the size of a pure dwarf pea…