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Klinefelter's syndrome is developed when the chromosome in male is

A. XXY

B. XXXY

C. XXYY

D. All of these

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  1. The nuclear membrane completely disappears during
  2. The best method to determine whether an individual is homozygous or heterozygous is
  3. Down's syndrome is an example of
  4. The chromosomal theroy of heredity implies that
  5. Chromosomes exhibit minimum coiling during
  6. The term 'meiosis' was coined bv
  7. Lethal genes are those which
  8. Linkage is
  9. Which disease results from the genetic inability to synthesize a single enzyme ?
  10. How many meiosis will be required to produce 102 pollen-grains ?
  11. Reverse transcription was discovered by
  12. A codon is a sequence of 3 nucleolides on
  13. The number of characters investigated by Mendel was
  14. The science dealing with study of inheritance and variation is
  15. DNA duplication occurs in
  16. Among the following which is a test cross?
  17. If an individual does not breed true for its characters, it is called
  18. When is the sex of an offspring decided
  19. A colour-blind man marries the daughter of a colour-blind person. In their progeny
  20. The genetic constitution of an organism is known as
  21. In the Operon concept, the regulator gene regulates chemical reactions in the cell by
  22. The possibilities of hereditary and evolutionary changes are greatest in species that reproduce by
  23. In humans, an example of sex-linked trait is
  24. A functional unit of a gene which specifies synthesis of one poly-peptide is known as
  25. The condition in which only one allele of a pair is present is known as
  26. A child is bom with an extra chromosome in each of its cells. This is usually the result of
  27.  A chemical mutagen is
  28. Transfer of a gene or genes through a virus is called
  29. Dyad is
  30. The scientists who rediscovered the Mendel's laws are