The condition in which only one allele of a pair is present is known as

A. Homozygous

B. Heterozygous

C. Hemizygous

D. Incomplete dominance

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  1. Transfer of a gene or genes through a virus is called
  2. Dyad is
  3. In the Operon concept, the regulator gene regulates chemical reactions in the cell by
  4. The best method to determine whether an individual is homozygous or heterozygous is
  5. The term 'meiosis' was coined bv
  6. The segment of DNA which participates in crossing over is known as
  7. A pure tall pea plant was reared in a soil poor in nutrition and reached the size of a pure dwarf pea…
  8. Diakinesis is characterised by
  9. A giant chromosome having many chromo-nemata lying side by side all along their length is called
  10. Which disease results from the genetic inability to synthesize a single enzyme ?
  11. The nuclear membrane completely disappears during
  12. Lethal genes are those which
  13. The scientists who rediscovered the Mendel's laws are
  14. The number of characters investigated by Mendel was
  15. Among the following which is a test cross?
  16. Which one of the following chemical characteristics is not common to all living beings ?
  17. A codon is a sequence of 3 nucleolides on
  18. The crossing of a homozygous tall plant with a dwarf would yield plants in the ratio of
  19. The science dealing with study of inheritance and variation is
  20. A child is bom with an extra chromosome in each of its cells. This is usually the result of
  21. The possibilities of hereditary and evolutionary changes are greatest in species that reproduce by
  22. If an individual does not breed true for its characters, it is called
  23. In a monohybrid cross the Fi ratio of a backcross is
  24. Albinism in com plants is best described as
  25. Klinefelter's syndrome is developed when the chromosome in male is
  26. Some people experience PTC paper on tongue as bitter, others as tasteless. This character is hereditary…
  27. Base substitutions from base analogues I are called
  28. A functional unit of a gene which specifies synthesis of one poly-peptide is known as
  29. Chromosomes exhibit minimum coiling during
  30.  A chemical mutagen is