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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. Chromosomes exhibit minimum coiling during
  2. When is the sex of an offspring decided
  3. DNA duplication occurs in
  4. A functional unit of a gene which specifies synthesis of one poly-peptide is known as
  5. Lethal genes are those which
  6. The possibilities of hereditary and evolutionary changes are greatest in species that reproduce by
  7. Linkage is
  8.  A chemical mutagen is
  9.  A person meets with an accident and great loss of blood has occurred. There is no time to analyse…
  10. Some people experience PTC paper on tongue as bitter, others as tasteless. This character is hereditary…
  11. The condition in which only one allele of a pair is present is known as
  12. Mutations which are not dominant are not lost by a gene pooL This is known as
  13. If an individual does not breed true for its characters, it is called
  14. In humans, an example of sex-linked trait is
  15. Linked genes may be separated by the process of
  16. Diakinesis is characterised by
  17. Down's syndrome is an example of
  18. A colour-blind man marries the daughter of a colour-blind person. In their progeny
  19. A pure tall pea plant was reared in a soil poor in nutrition and reached the size of a pure dwarf pea…
  20. The crossing of a homozygous tall plant with a dwarf would yield plants in the ratio of
  21. How many meiosis will be required to produce 102 pollen-grains ?
  22. Klinefelter's syndrome is developed when the chromosome in male is
  23. Crossing over in meiosis occurs in
  24. Exhibition of superiority by a hybrid over both of its parents is called
  25. In a monohybrid cross the Fi ratio of a backcross is
  26. The first person to induce mutations was
  27. When two genes are situated very close to each other in a chromosome
  28. Transfer of a gene or genes through a virus is called
  29. An offspring of two homozygous parents different from one another by alleles at only one gene locus…
  30. Dyad is