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The chromosomal theroy of heredity implies that

A. chromosomes are composed of DNA and protein

B. genes are composed of chromosomes

C. organism cannot live withoutchromosomes

D. genes are located on the chromosomes and are transmitted to the next generation through them.

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  1. When is the sex of an offspring decided
  2. The science dealing with study of inheritance and variation is
  3. Lethal genes are those which
  4. In the Operon concept, the regulator gene regulates chemical reactions in the cell by
  5. A codon is a sequence of 3 nucleolides on
  6. The crossing of a homozygous tall plant with a dwarf would yield plants in the ratio of
  7. DNA duplication occurs in
  8. The possibilities of hereditary and evolutionary changes are greatest in species that reproduce by
  9. When two genes are situated very close to each other in a chromosome
  10. Linked genes may be separated by the process of
  11. If an individual does not breed true for its characters, it is called
  12. In a monohybrid cross the Fi ratio of a backcross is
  13. A functional unit of a gene which specifies synthesis of one poly-peptide is known as
  14.  A chemical mutagen is
  15. The condition in which only one allele of a pair is present is known as
  16. Mutations which are not dominant are not lost by a gene pooL This is known as
  17. How many meiosis will be required to produce 102 pollen-grains ?
  18. Reverse transcription was discovered by
  19. An offspring of two homozygous parents different from one another by alleles at only one gene locus…
  20. Colour blindness is caused due to
  21. A child is bom with an extra chromosome in each of its cells. This is usually the result of
  22. The first person to induce mutations was
  23. In humans, an example of sex-linked trait is
  24. Diakinesis is characterised by
  25. Albinism in com plants is best described as
  26. The genetic constitution of an organism is known as
  27. The best method to determine whether an individual is homozygous or heterozygous is
  28. The term 'meiosis' was coined bv
  29. A giant chromosome having many chromo-nemata lying side by side all along their length is called
  30. Crossing over in meiosis occurs in