In a monohybrid cross the Fi ratio of a backcross is

A. 1:1

B. 3:1

C. 1:2:1

D. 9:3:3:3

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  1. A colour-blind man marries the daughter of a colour-blind person. In their progeny
  2. The genetic constitution of an organism is known as
  3. A codon is a sequence of 3 nucleolides on
  4. The possibilities of hereditary and evolutionary changes are greatest in species that reproduce by
  5. The science dealing with study of inheritance and variation is
  6. Mutations which are not dominant are not lost by a gene pooL This is known as
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  9. Linkage is
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  15. Dyad is
  16. In the Operon concept, the regulator gene regulates chemical reactions in the cell by
  17. A pure tall pea plant was reared in a soil poor in nutrition and reached the size of a pure dwarf pea…
  18. In humans, an example of sex-linked trait is
  19. The segment of DNA which participates in crossing over is known as
  20. Klinefelter's syndrome is developed when the chromosome in male is
  21. The nuclear membrane completely disappears during
  22. Linked genes may be separated by the process of
  23. Down's syndrome is an example of
  24. Among the following which is a test cross?
  25. If an individual does not breed true for its characters, it is called
  26. Which disease results from the genetic inability to synthesize a single enzyme ?
  27. A functional unit of a gene which specifies synthesis of one poly-peptide is known as
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  29. A child is bom with an extra chromosome in each of its cells. This is usually the result of
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