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Some people experience PTC paper on tongue as bitter, others as tasteless. This character is hereditary in nature. Suppose T stands for dominant gene and t for recessive gene, the genetic make up of a person who cannot taste is

A. TT

B. Tt

C. tt

D. None of these

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  1. Which one of the following chemical characteristics is not common to all living beings ?
  2. Base substitutions from base analogues I are called
  3. Dyad is
  4. The science dealing with study of inheritance and variation is
  5. Linkage is
  6. When is the sex of an offspring decided
  7. Among the following which is a test cross?
  8. In the Operon concept, the regulator gene regulates chemical reactions in the cell by
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  11. A codon is a sequence of 3 nucleolides on
  12. A functional unit of a gene which specifies synthesis of one poly-peptide is known as
  13. A child is bom with an extra chromosome in each of its cells. This is usually the result of
  14. The possibilities of hereditary and evolutionary changes are greatest in species that reproduce by
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  16. Colour blindness is caused due to
  17. The term 'meiosis' was coined bv
  18.  A chemical mutagen is
  19. Linked genes may be separated by the process of
  20. The condition in which only one allele of a pair is present is known as
  21. Diakinesis is characterised by
  22. The best method to determine whether an individual is homozygous or heterozygous is
  23. When two genes are situated very close to each other in a chromosome
  24. A pure tall pea plant was reared in a soil poor in nutrition and reached the size of a pure dwarf pea…
  25.  A person meets with an accident and great loss of blood has occurred. There is no time to analyse…
  26. Exhibition of superiority by a hybrid over both of its parents is called
  27. The scientists who rediscovered the Mendel's laws are
  28. DNA duplication occurs in
  29. Mutations which are not dominant are not lost by a gene pooL This is known as
  30. Down's syndrome is an example of