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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. Crossing over in meiosis occurs in
  2. The crossing of a homozygous tall plant with a dwarf would yield plants in the ratio of
  3. In a monohybrid cross the Fi ratio of a backcross is
  4. A functional unit of a gene which specifies synthesis of one poly-peptide is known as
  5. Albinism in com plants is best described as
  6. A pure tall pea plant was reared in a soil poor in nutrition and reached the size of a pure dwarf pea…
  7. Exhibition of superiority by a hybrid over both of its parents is called
  8. A codon is a sequence of 3 nucleolides on
  9. The number of characters investigated by Mendel was
  10. Some people experience PTC paper on tongue as bitter, others as tasteless. This character is hereditary…
  11. In the Operon concept, the regulator gene regulates chemical reactions in the cell by
  12. Colour blindness is caused due to
  13. Lethal genes are those which
  14. When two genes are situated very close to each other in a chromosome
  15. Which disease results from the genetic inability to synthesize a single enzyme ?
  16. DNA duplication occurs in
  17. How many meiosis will be required to produce 102 pollen-grains ?
  18. The scientists who rediscovered the Mendel's laws are
  19. Klinefelter's syndrome is developed when the chromosome in male is
  20. The condition in which only one allele of a pair is present is known as
  21. The term 'meiosis' was coined bv
  22. Dyad is
  23. Base substitutions from base analogues I are called
  24. The possibilities of hereditary and evolutionary changes are greatest in species that reproduce by
  25. A giant chromosome having many chromo-nemata lying side by side all along their length is called
  26. Down's syndrome is an example of
  27. The first person to induce mutations was
  28. The nuclear membrane completely disappears during
  29. When is the sex of an offspring decided
  30. A child is bom with an extra chromosome in each of its cells. This is usually the result of