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 A person meets with an accident and great loss of blood has occurred. There is no time to analyse his blood group. It is safe to transfuse blood of

A. AB, RH+

B. AB, RH-

C. O, RH-

D. O, RH+

Correct Answer : C.


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  1. Colour blindness is caused due to
  2. Exhibition of superiority by a hybrid over both of its parents is called
  3.  A chemical mutagen is
  4. Among the following which is a test cross?
  5. The best method to determine whether an individual is homozygous or heterozygous is
  6. The chromosomal theroy of heredity implies that
  7. A codon is a sequence of 3 nucleolides on
  8. Base substitutions from base analogues I are called
  9. Diakinesis is characterised by
  10. An offspring of two homozygous parents different from one another by alleles at only one gene locus…
  11. The segment of DNA which participates in crossing over is known as
  12. How many meiosis will be required to produce 102 pollen-grains ?
  13. Which one of the following chemical characteristics is not common to all living beings ?
  14. Dyad is
  15. Klinefelter's syndrome is developed when the chromosome in male is
  16. Which disease results from the genetic inability to synthesize a single enzyme ?
  17. The possibilities of hereditary and evolutionary changes are greatest in species that reproduce by
  18. Crossing over in meiosis occurs in
  19. The first person to induce mutations was
  20. The condition in which only one allele of a pair is present is known as
  21. A colour-blind man marries the daughter of a colour-blind person. In their progeny
  22. A functional unit of a gene which specifies synthesis of one poly-peptide is known as
  23. Some people experience PTC paper on tongue as bitter, others as tasteless. This character is hereditary…
  24. Linked genes may be separated by the process of
  25. A pure tall pea plant was reared in a soil poor in nutrition and reached the size of a pure dwarf pea…
  26. DNA duplication occurs in
  27. Down's syndrome is an example of
  28.  A person meets with an accident and great loss of blood has occurred. There is no time to analyse…
  29. In the Operon concept, the regulator gene regulates chemical reactions in the cell by
  30. The number of characters investigated by Mendel was