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. In humans, an example of sex-linked trait is
  2. The nuclear membrane completely disappears during
  3. A pure tall pea plant was reared in a soil poor in nutrition and reached the size of a pure dwarf pea…
  4. The crossing of a homozygous tall plant with a dwarf would yield plants in the ratio of
  5. Klinefelter's syndrome is developed when the chromosome in male is
  6. The condition in which only one allele of a pair is present is known as
  7. The term 'meiosis' was coined bv
  8.  A chemical mutagen is
  9. The chromosomal theroy of heredity implies that
  10. Dyad is
  11. Linkage is
  12. An offspring of two homozygous parents different from one another by alleles at only one gene locus…
  13. Albinism in com plants is best described as
  14. A functional unit of a gene which specifies synthesis of one poly-peptide is known as
  15. In the Operon concept, the regulator gene regulates chemical reactions in the cell by
  16. Down's syndrome is an example of
  17. In a monohybrid cross the Fi ratio of a backcross is
  18. Mutations which are not dominant are not lost by a gene pooL This is known as
  19. Diakinesis is characterised by
  20. Reverse transcription was discovered by
  21. When two genes are situated very close to each other in a chromosome
  22. The best method to determine whether an individual is homozygous or heterozygous is
  23. The segment of DNA which participates in crossing over is known as
  24. Which one of the following chemical characteristics is not common to all living beings ?
  25. Base substitutions from base analogues I are called
  26. A giant chromosome having many chromo-nemata lying side by side all along their length is called
  27. The scientists who rediscovered the Mendel's laws are
  28. The science dealing with study of inheritance and variation is
  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