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Which disease results from the genetic inability to synthesize a single enzyme ?

A. Diabetes

B. Phenylketonuria

C. Colour-blindness

D. Down's syndrome

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  1. A child is bom with an extra chromosome in each of its cells. This is usually the result of
  2. The number of characters investigated by Mendel was
  3. The scientists who rediscovered the Mendel's laws are
  4. Down's syndrome is an example of
  5. The science dealing with study of inheritance and variation is
  6. The segment of DNA which participates in crossing over is known as
  7. The possibilities of hereditary and evolutionary changes are greatest in species that reproduce by
  8. Diakinesis is characterised by
  9. A codon is a sequence of 3 nucleolides on
  10. Linkage is
  11. The crossing of a homozygous tall plant with a dwarf would yield plants in the ratio of
  12. The first person to induce mutations was
  13. Chromosomes exhibit minimum coiling during
  14. In humans, an example of sex-linked trait is
  15. A pure tall pea plant was reared in a soil poor in nutrition and reached the size of a pure dwarf pea…
  16. Dyad is
  17. If an individual does not breed true for its characters, it is called
  18. The nuclear membrane completely disappears during
  19. Which disease results from the genetic inability to synthesize a single enzyme ?
  20. Which one of the following chemical characteristics is not common to all living beings ?
  21. Transfer of a gene or genes through a virus is called
  22. The chromosomal theroy of heredity implies that
  23. Exhibition of superiority by a hybrid over both of its parents is called
  24.  A person meets with an accident and great loss of blood has occurred. There is no time to analyse…
  25. Among the following which is a test cross?
  26. Reverse transcription was discovered by
  27. The term 'meiosis' was coined bv
  28. DNA duplication occurs in
  29. Some people experience PTC paper on tongue as bitter, others as tasteless. This character is hereditary…
  30. When is the sex of an offspring decided