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Down's syndrome is an example of

A. monosomy

B. trisomy

C. triploidy

D. polyploidy

Correct Answer : B.


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  3. The first person to induce mutations was
  4. Dyad is
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  6. The scientists who rediscovered the Mendel's laws are
  7. The science dealing with study of inheritance and variation is
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  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
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  16. Some people experience PTC paper on tongue as bitter, others as tasteless. This character is hereditary…
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  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
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  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
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