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+

You can do it
  1. The science dealing with study of inheritance and variation is
  2. In humans, an example of sex-linked trait is
  3. Base substitutions from base analogues I are called
  4. The possibilities of hereditary and evolutionary changes are greatest in species that reproduce by
  5. Which one of the following chemical characteristics is not common to all living beings ?
  6. A giant chromosome having many chromo-nemata lying side by side all along their length is called
  7. Diakinesis is characterised by
  8. The genetic constitution of an organism is known as
  9. Linked genes may be separated by the process of
  10. Dyad is
  11. Among the following which is a test cross?
  12. The best method to determine whether an individual is homozygous or heterozygous is
  13. The segment of DNA which participates in crossing over is known as
  14. If an individual does not breed true for its characters, it is called
  15. Colour blindness is caused due to
  16. Reverse transcription was discovered by
  17. Linkage is
  18. The first person to induce mutations was
  19. The chromosomal theroy of heredity implies that
  20. In a monohybrid cross the Fi ratio of a backcross is
  21. A functional unit of a gene which specifies synthesis of one poly-peptide is known as
  22. A child is bom with an extra chromosome in each of its cells. This is usually the result of
  23. Some people experience PTC paper on tongue as bitter, others as tasteless. This character is hereditary…
  24. The scientists who rediscovered the Mendel's laws are
  25. Crossing over in meiosis occurs in
  26. Chromosomes exhibit minimum coiling during
  27. The number of characters investigated by Mendel was
  28. Down's syndrome is an example of
  29. DNA duplication occurs in
  30. How many meiosis will be required to produce 102 pollen-grains ?