Down's syndrome is an example of

A. monosomy

B. trisomy

C. triploidy

D. polyploidy

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  1. The chromosomal theroy of heredity implies that
  2. A functional unit of a gene which specifies synthesis of one poly-peptide is known as
  3. The first person to induce mutations was
  4. Dyad is
  5. Exhibition of superiority by a hybrid over both of its parents is called
  6. The scientists who rediscovered the Mendel's laws are
  7. The science dealing with study of inheritance and variation is
  8.  A chemical mutagen is
  9. In humans, an example of sex-linked trait is
  10. Diakinesis is characterised by
  11. Linked genes may be separated by the process of
  12. Base substitutions from base analogues I are called
  13. Albinism in com plants is best described as
  14. Which disease results from the genetic inability to synthesize a single enzyme ?
  15. A pure tall pea plant was reared in a soil poor in nutrition and reached the size of a pure dwarf pea…
  16. Some people experience PTC paper on tongue as bitter, others as tasteless. This character is hereditary…
  17. The genetic constitution of an organism is known as
  18. The possibilities of hereditary and evolutionary changes are greatest in species that reproduce by
  19. How many meiosis will be required to produce 102 pollen-grains ?
  20. The crossing of a homozygous tall plant with a dwarf would yield plants in the ratio of
  21. Linkage is
  22. Which one of the following chemical characteristics is not common to all living beings ?
  23. A giant chromosome having many chromo-nemata lying side by side all along their length is called
  24. Reverse transcription was discovered by
  25. Chromosomes exhibit minimum coiling during
  26. An offspring of two homozygous parents different from one another by alleles at only one gene locus…
  27. When is the sex of an offspring decided
  28. The condition in which only one allele of a pair is present is known as
  29. Mutations which are not dominant are not lost by a gene pooL This is known as
  30. A codon is a sequence of 3 nucleolides on