Among the following which is a test cross?

A. TtxTt


C. TTxTt

D. Ttxtt

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  1. The condition in which only one allele of a pair is present is known as
  2. Among the following which is a test cross?
  3. When is the sex of an offspring decided
  4. In humans, an example of sex-linked trait is
  5. In a monohybrid cross the Fi ratio of a backcross is
  6. The chromosomal theroy of heredity implies that
  7. Transfer of a gene or genes through a virus is called
  8. Mutations which are not dominant are not lost by a gene pooL This is known as
  9. Which one of the following chemical characteristics is not common to all living beings ?
  10. A giant chromosome having many chromo-nemata lying side by side all along their length is called
  11. A functional unit of a gene which specifies synthesis of one poly-peptide is known as
  12. The segment of DNA which participates in crossing over is known as
  13. The term 'meiosis' was coined bv
  14. Lethal genes are those which
  15. The nuclear membrane completely disappears during
  16. Chromosomes exhibit minimum coiling during
  17. Crossing over in meiosis occurs in
  18. The science dealing with study of inheritance and variation is
  19. An offspring of two homozygous parents different from one another by alleles at only one gene locus…
  20. Reverse transcription was discovered by
  21. Klinefelter's syndrome is developed when the chromosome in male is
  22. The first person to induce mutations was
  23. Down's syndrome is an example of
  24. The genetic constitution of an organism is known as
  25. The number of characters investigated by Mendel was
  26. DNA duplication occurs in
  27. In the Operon concept, the regulator gene regulates chemical reactions in the cell by
  28. A pure tall pea plant was reared in a soil poor in nutrition and reached the size of a pure dwarf pea…
  29. A colour-blind man marries the daughter of a colour-blind person. In their progeny
  30. Base substitutions from base analogues I are called