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A colour-blind man marries the daughter of a colour-blind person. In their progeny

A. none of her daughters are colour-blind

B. all her sons are colour-blind

C. all her daughters are colour-blind

D. half of her sons are colour-blind

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  1. A giant chromosome having many chromo-nemata lying side by side all along their length is called
  2. Colour blindness is caused due to
  3. Mutations which are not dominant are not lost by a gene pooL This is known as
  4. Chromosomes exhibit minimum coiling during
  5. A child is bom with an extra chromosome in each of its cells. This is usually the result of
  6. Among the following which is a test cross?
  7. Transfer of a gene or genes through a virus is called
  8. The chromosomal theroy of heredity implies that
  9.  A chemical mutagen is
  10.  A person meets with an accident and great loss of blood has occurred. There is no time to analyse…
  11. In the Operon concept, the regulator gene regulates chemical reactions in the cell by
  12. How many meiosis will be required to produce 102 pollen-grains ?
  13. Crossing over in meiosis occurs in
  14. Base substitutions from base analogues I are called
  15. When two genes are situated very close to each other in a chromosome
  16. The possibilities of hereditary and evolutionary changes are greatest in species that reproduce by
  17. Albinism in com plants is best described as
  18. Which disease results from the genetic inability to synthesize a single enzyme ?
  19. The number of characters investigated by Mendel was
  20. Lethal genes are those which
  21. Linkage is
  22. Klinefelter's syndrome is developed when the chromosome in male is
  23. The science dealing with study of inheritance and variation is
  24. If an individual does not breed true for its characters, it is called
  25. The nuclear membrane completely disappears during
  26. The best method to determine whether an individual is homozygous or heterozygous is
  27. Some people experience PTC paper on tongue as bitter, others as tasteless. This character is hereditary…
  28. A colour-blind man marries the daughter of a colour-blind person. In their progeny
  29. The genetic constitution of an organism is known as
  30. The scientists who rediscovered the Mendel's laws are