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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. Diakinesis is characterised by
  2. Which one of the following chemical characteristics is not common to all living beings ?
  3. Lethal genes are those which
  4. Klinefelter's syndrome is developed when the chromosome in male is
  5. Linked genes may be separated by the process of
  6. Crossing over in meiosis occurs in
  7. Dyad is
  8. Which disease results from the genetic inability to synthesize a single enzyme ?
  9. Down's syndrome is an example of
  10. Some people experience PTC paper on tongue as bitter, others as tasteless. This character is hereditary…
  11. A child is bom with an extra chromosome in each of its cells. This is usually the result of
  12. Mutations which are not dominant are not lost by a gene pooL This is known as
  13. When is the sex of an offspring decided
  14. The science dealing with study of inheritance and variation is
  15. Exhibition of superiority by a hybrid over both of its parents is called
  16. Colour blindness is caused due to
  17. Transfer of a gene or genes through a virus is called
  18. The first person to induce mutations was
  19. A functional unit of a gene which specifies synthesis of one poly-peptide is known as
  20. A colour-blind man marries the daughter of a colour-blind person. In their progeny
  21. The segment of DNA which participates in crossing over is known as
  22. In a monohybrid cross the Fi ratio of a backcross is
  23.  A person meets with an accident and great loss of blood has occurred. There is no time to analyse…
  24. The condition in which only one allele of a pair is present is known as
  25. A giant chromosome having many chromo-nemata lying side by side all along their length is called
  26. Reverse transcription was discovered by
  27. The scientists who rediscovered the Mendel's laws are
  28. The chromosomal theroy of heredity implies that
  29. The number of characters investigated by Mendel was
  30. When two genes are situated very close to each other in a chromosome