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 pure tall pea plant was reared in a soil poor in nutrition and reached the size of a pure dwarf pea…
  2. A giant chromosome having many chromo-nemata lying side by side all along their length is called
  3. Dyad is
  4. Colour blindness is caused due to
  5. The condition in which only one allele of a pair is present is known as
  6. A codon is a sequence of 3 nucleolides on
  7. Klinefelter's syndrome is developed when the chromosome in male is
  8. The possibilities of hereditary and evolutionary changes are greatest in species that reproduce by
  9. Down's syndrome is an example of
  10. Linked genes may be separated by the process of
  11. A functional unit of a gene which specifies synthesis of one poly-peptide is known as
  12. DNA duplication occurs in
  13. An offspring of two homozygous parents different from one another by alleles at only one gene locus…
  14. If an individual does not breed true for its characters, it is called
  15. A child is bom with an extra chromosome in each of its cells. This is usually the result of
  16. Lethal genes are those which
  17. The crossing of a homozygous tall plant with a dwarf would yield plants in the ratio of
  18. Some people experience PTC paper on tongue as bitter, others as tasteless. This character is hereditary…
  19. The best method to determine whether an individual is homozygous or heterozygous is
  20. In a monohybrid cross the Fi ratio of a backcross is
  21.  A person meets with an accident and great loss of blood has occurred. There is no time to analyse…
  22. Chromosomes exhibit minimum coiling during
  23. Transfer of a gene or genes through a virus is called
  24. The science dealing with study of inheritance and variation is
  25. When is the sex of an offspring decided
  26. When two genes are situated very close to each other in a chromosome
  27.  A chemical mutagen is
  28. In the Operon concept, the regulator gene regulates chemical reactions in the cell by
  29. Exhibition of superiority by a hybrid over both of its parents is called
  30. Which disease results from the genetic inability to synthesize a single enzyme ?