Down's syndrome is an example of

A. monosomy

B. trisomy

C. triploidy

D. polyploidy

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  1. The nuclear membrane completely disappears during
  2. The term 'meiosis' was coined bv
  3. Down's syndrome is an example of
  4. Exhibition of superiority by a hybrid over both of its parents is called
  5. A giant chromosome having many chromo-nemata lying side by side all along their length is called
  6. Linkage is
  7. Colour blindness is caused due to
  8. The genetic constitution of an organism is known as
  9. Chromosomes exhibit minimum coiling during
  10. The chromosomal theroy of heredity implies that
  11. When two genes are situated very close to each other in a chromosome
  12. In a monohybrid cross the Fi ratio of a backcross is
  13. If an individual does not breed true for its characters, it is called
  14.  A person meets with an accident and great loss of blood has occurred. There is no time to analyse…
  15. Klinefelter's syndrome is developed when the chromosome in male is
  16. An offspring of two homozygous parents different from one another by alleles at only one gene locus…
  17. Crossing over in meiosis occurs in
  18. The best method to determine whether an individual is homozygous or heterozygous is
  19. Linked genes may be separated by the process of
  20. A codon is a sequence of 3 nucleolides on
  21. The first person to induce mutations was
  22. Transfer of a gene or genes through a virus is called
  23. A child is bom with an extra chromosome in each of its cells. This is usually the result of
  24. The crossing of a homozygous tall plant with a dwarf would yield plants in the ratio of
  25. Which disease results from the genetic inability to synthesize a single enzyme ?
  26. A functional unit of a gene which specifies synthesis of one poly-peptide is known as
  27. Mutations which are not dominant are not lost by a gene pooL This is known as
  28. Some people experience PTC paper on tongue as bitter, others as tasteless. This character is hereditary…
  29. A colour-blind man marries the daughter of a colour-blind person. In their progeny
  30. DNA duplication occurs in