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Dyad is

A. a pair of homologous chromosomes

B. a pair of non-homologous chromosomes

C. a pair of sister chromosomes

D. a pair of non-sister chromosomes

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  1. Crossing over in meiosis occurs in
  2. The genetic constitution of an organism is known as
  3. Which disease results from the genetic inability to synthesize a single enzyme ?
  4. In a monohybrid cross the Fi ratio of a backcross is
  5. An offspring of two homozygous parents different from one another by alleles at only one gene locus…
  6. A pure tall pea plant was reared in a soil poor in nutrition and reached the size of a pure dwarf pea…
  7. In the Operon concept, the regulator gene regulates chemical reactions in the cell by
  8. How many meiosis will be required to produce 102 pollen-grains ?
  9.  A person meets with an accident and great loss of blood has occurred. There is no time to analyse…
  10. The crossing of a homozygous tall plant with a dwarf would yield plants in the ratio of
  11. Base substitutions from base analogues I are called
  12. DNA duplication occurs in
  13. A colour-blind man marries the daughter of a colour-blind person. In their progeny
  14. The chromosomal theroy of heredity implies that
  15. Among the following which is a test cross?
  16. Klinefelter's syndrome is developed when the chromosome in male is
  17. Lethal genes are those which
  18. A functional unit of a gene which specifies synthesis of one poly-peptide is known as
  19. Colour blindness is caused due to
  20. Diakinesis is characterised by
  21. Linked genes may be separated by the process of
  22. The best method to determine whether an individual is homozygous or heterozygous is
  23. A child is bom with an extra chromosome in each of its cells. This is usually the result of
  24. The possibilities of hereditary and evolutionary changes are greatest in species that reproduce by
  25. The number of characters investigated by Mendel was
  26. When is the sex of an offspring decided
  27. If an individual does not breed true for its characters, it is called
  28. Some people experience PTC paper on tongue as bitter, others as tasteless. This character is hereditary…
  29. Exhibition of superiority by a hybrid over both of its parents is called
  30. The nuclear membrane completely disappears during