Among the following which is a test cross?

A. TtxTt


C. TTxTt

D. Ttxtt

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  1. Crossing over in meiosis occurs in
  2. Lethal genes are those which
  3. A giant chromosome having many chromo-nemata lying side by side all along their length is called
  4. When is the sex of an offspring decided
  5. Klinefelter's syndrome is developed when the chromosome in male is
  6. Among the following which is a test cross?
  7. A child is bom with an extra chromosome in each of its cells. This is usually the result of
  8. The nuclear membrane completely disappears during
  9. An offspring of two homozygous parents different from one another by alleles at only one gene locus…
  10. Exhibition of superiority by a hybrid over both of its parents is called
  11. The first person to induce mutations was
  12. Down's syndrome is an example of
  13. Base substitutions from base analogues I are called
  14. The number of characters investigated by Mendel was
  15. Transfer of a gene or genes through a virus is called
  16. The possibilities of hereditary and evolutionary changes are greatest in species that reproduce by
  17.  A chemical mutagen is
  18. Linked genes may be separated by the process of
  19. The science dealing with study of inheritance and variation is
  20.  A person meets with an accident and great loss of blood has occurred. There is no time to analyse…
  21. Dyad is
  22. The segment of DNA which participates in crossing over is known as
  23. A functional unit of a gene which specifies synthesis of one poly-peptide is known as
  24. A colour-blind man marries the daughter of a colour-blind person. In their progeny
  25. The chromosomal theroy of heredity implies that
  26. In the Operon concept, the regulator gene regulates chemical reactions in the cell by
  27. Linkage is
  28. Chromosomes exhibit minimum coiling during
  29. The crossing of a homozygous tall plant with a dwarf would yield plants in the ratio of
  30. DNA duplication occurs in