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Lethal genes are those which

A. cause the death of the organism in which they are present

B. cause the death of the homozygous infant being formed

C. cause the death of heterozygous infant being formed

D. all of the above

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  1. A giant chromosome having many chromo-nemata lying side by side all along their length is called
  2. How many meiosis will be required to produce 102 pollen-grains ?
  3. When two genes are situated very close to each other in a chromosome
  4. The scientists who rediscovered the Mendel's laws are
  5. In humans, an example of sex-linked trait is
  6. DNA duplication occurs in
  7. A child is bom with an extra chromosome in each of its cells. This is usually the result of
  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. A functional unit of a gene which specifies synthesis of one poly-peptide is known as
  11. The crossing of a homozygous tall plant with a dwarf would yield plants in the ratio of
  12. Base substitutions from base analogues I are called
  13. The genetic constitution of an organism is known as
  14. The nuclear membrane completely disappears during
  15. The chromosomal theroy of heredity implies that
  16. Linkage is
  17. Klinefelter's syndrome is developed when the chromosome in male is
  18. A pure tall pea plant was reared in a soil poor in nutrition and reached the size of a pure dwarf pea…
  19. Crossing over in meiosis occurs in
  20. If an individual does not breed true for its characters, it is called
  21. A codon is a sequence of 3 nucleolides on
  22. The condition in which only one allele of a pair is present is known as
  23. Albinism in com plants is best described as
  24. Colour blindness is caused due to
  25. Diakinesis is characterised by
  26. The term 'meiosis' was coined bv
  27. The number of characters investigated by Mendel was
  28. Linked genes may be separated by the process of
  29. In the Operon concept, the regulator gene regulates chemical reactions in the cell by
  30. In a monohybrid cross the Fi ratio of a backcross is