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Among the following which is a test cross?

A. TtxTt

B. TTxTT

C. TTxTt

D. Ttxtt

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  1. In the Operon concept, the regulator gene regulates chemical reactions in the cell by
  2. The segment of DNA which participates in crossing over is known as
  3. Reverse transcription was discovered by
  4. The chromosomal theroy of heredity implies that
  5. Some people experience PTC paper on tongue as bitter, others as tasteless. This character is hereditary…
  6. A giant chromosome having many chromo-nemata lying side by side all along their length is called
  7. Klinefelter's syndrome is developed when the chromosome in male is
  8. The best method to determine whether an individual is homozygous or heterozygous is
  9. In humans, an example of sex-linked trait is
  10. When two genes are situated very close to each other in a chromosome
  11. Exhibition of superiority by a hybrid over both of its parents is called
  12. Base substitutions from base analogues I are called
  13. A colour-blind man marries the daughter of a colour-blind person. In their progeny
  14. A codon is a sequence of 3 nucleolides on
  15. The nuclear membrane completely disappears during
  16. The scientists who rediscovered the Mendel's laws are
  17. The possibilities of hereditary and evolutionary changes are greatest in species that reproduce by
  18. A pure tall pea plant was reared in a soil poor in nutrition and reached the size of a pure dwarf pea…
  19. Which disease results from the genetic inability to synthesize a single enzyme ?
  20. Crossing over in meiosis occurs in
  21. The first person to induce mutations was
  22.  A person meets with an accident and great loss of blood has occurred. There is no time to analyse…
  23. Linked genes may be separated by the process of
  24. In a monohybrid cross the Fi ratio of a backcross is
  25. Dyad is
  26. The term 'meiosis' was coined bv
  27. The number of characters investigated by Mendel was
  28. The condition in which only one allele of a pair is present is known as
  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