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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 best method to determine whether an individual is homozygous or heterozygous is
  2. The chromosomal theroy of heredity implies that
  3. In the Operon concept, the regulator gene regulates chemical reactions in the cell by
  4. The possibilities of hereditary and evolutionary changes are greatest in species that reproduce by
  5. The condition in which only one allele of a pair is present is known as
  6. In humans, an example of sex-linked trait is
  7. Among the following which is a test cross?
  8. An offspring of two homozygous parents different from one another by alleles at only one gene locus…
  9. The scientists who rediscovered the Mendel's laws are
  10. When is the sex of an offspring decided
  11. Base substitutions from base analogues I are called
  12. The science dealing with study of inheritance and variation is
  13. How many meiosis will be required to produce 102 pollen-grains ?
  14. A pure tall pea plant was reared in a soil poor in nutrition and reached the size of a pure dwarf pea…
  15. The first person to induce mutations was
  16. A colour-blind man marries the daughter of a colour-blind person. In their progeny
  17. Colour blindness is caused due to
  18.  A chemical mutagen is
  19. Diakinesis is characterised by
  20. Lethal genes are those which
  21. Down's syndrome is an example of
  22. A functional unit of a gene which specifies synthesis of one poly-peptide is known as
  23. When two genes are situated very close to each other in a chromosome
  24. The genetic constitution of an organism is known as
  25. Dyad is
  26. The term 'meiosis' was coined bv
  27. Linkage is
  28. The crossing of a homozygous tall plant with a dwarf would yield plants in the ratio of
  29. Which disease results from the genetic inability to synthesize a single enzyme ?
  30. The nuclear membrane completely disappears during