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. When two genes are situated very close to each other in a chromosome
  2. Chromosomes exhibit minimum coiling during
  3. A codon is a sequence of 3 nucleolides on
  4. Down's syndrome is an example of
  5. Exhibition of superiority by a hybrid over both of its parents is called
  6. Klinefelter's syndrome is developed when the chromosome in male is
  7. Transfer of a gene or genes through a virus is called
  8. Lethal genes are those which
  9. Albinism in com plants is best described as
  10. The genetic constitution of an organism is known as
  11. Diakinesis is characterised by
  12. When is the sex of an offspring decided
  13. Which one of the following chemical characteristics is not common to all living beings ?
  14. The possibilities of hereditary and evolutionary changes are greatest in species that reproduce by
  15. Dyad is
  16. Among the following which is a test cross?
  17. A giant chromosome having many chromo-nemata lying side by side all along their length is called
  18. A functional unit of a gene which specifies synthesis of one poly-peptide is known as
  19.  A chemical mutagen is
  20. Linked genes may be separated by the process of
  21. The term 'meiosis' was coined bv
  22. The chromosomal theroy of heredity implies that
  23. Colour blindness is caused due to
  24. In the Operon concept, the regulator gene regulates chemical reactions in the cell by
  25. The number of characters investigated by Mendel was
  26. How many meiosis will be required to produce 102 pollen-grains ?
  27. The first person to induce mutations was
  28. DNA duplication occurs in
  29. The science dealing with study of inheritance and variation is
  30. The scientists who rediscovered the Mendel's laws are