Down's syndrome is an example of

A. monosomy

B. trisomy

C. triploidy

D. polyploidy

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  1. Exhibition of superiority by a hybrid over both of its parents is called
  2. A pure tall pea plant was reared in a soil poor in nutrition and reached the size of a pure dwarf pea…
  3. The term 'meiosis' was coined bv
  4.  A chemical mutagen is
  5. Dyad is
  6. Which disease results from the genetic inability to synthesize a single enzyme ?
  7. The scientists who rediscovered the Mendel's laws are
  8. DNA duplication occurs in
  9. Which one of the following chemical characteristics is not common to all living beings ?
  10. Some people experience PTC paper on tongue as bitter, others as tasteless. This character is hereditary…
  11. Colour blindness is caused due to
  12. The segment of DNA which participates in crossing over is known as
  13. Klinefelter's syndrome is developed when the chromosome in male is
  14. Down's syndrome is an example of
  15. The genetic constitution of an organism is known as
  16. Crossing over in meiosis occurs in
  17. The first person to induce mutations was
  18. The condition in which only one allele of a pair is present is known as
  19. Albinism in com plants is best described as
  20. The crossing of a homozygous tall plant with a dwarf would yield plants in the ratio of
  21. In humans, an example of sex-linked trait is
  22. Among the following which is a test cross?
  23. The number of characters investigated by Mendel was
  24. A functional unit of a gene which specifies synthesis of one poly-peptide is known as
  25. The chromosomal theroy of heredity implies that
  26. The science dealing with study of inheritance and variation is
  27. When is the sex of an offspring decided
  28. The best method to determine whether an individual is homozygous or heterozygous is
  29. In a monohybrid cross the Fi ratio of a backcross is
  30. When two genes are situated very close to each other in a chromosome