When two genes are situated very close to each other in a chromosome

A. the percentage of crossing over between themis high

B. hardly any cross-overs detected

C. no crossing-over can ever take place between them

D. only double cross overs can take place between them.

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  1. A giant chromosome having many chromo-nemata lying side by side all along their length is called
  2. The possibilities of hereditary and evolutionary changes are greatest in species that reproduce by
  3. When is the sex of an offspring decided
  4. A pure tall pea plant was reared in a soil poor in nutrition and reached the size of a pure dwarf pea…
  5. The crossing of a homozygous tall plant with a dwarf would yield plants in the ratio of
  6. A codon is a sequence of 3 nucleolides on
  7. If an individual does not breed true for its characters, it is called
  8. The genetic constitution of an organism is known as
  9. The condition in which only one allele of a pair is present is known as
  10. Crossing over in meiosis occurs in
  11. Chromosomes exhibit minimum coiling during
  12. Among the following which is a test cross?
  13. Klinefelter's syndrome is developed when the chromosome in male is
  14. The science dealing with study of inheritance and variation is
  15. In humans, an example of sex-linked trait is
  16. The segment of DNA which participates in crossing over is known as
  17. A child is bom with an extra chromosome in each of its cells. This is usually the result of
  18. A functional unit of a gene which specifies synthesis of one poly-peptide is known as
  19.  A person meets with an accident and great loss of blood has occurred. There is no time to analyse…
  20. Which one of the following chemical characteristics is not common to all living beings ?
  21. The first person to induce mutations was
  22. Albinism in com plants is best described as
  23. Mutations which are not dominant are not lost by a gene pooL This is known as
  24. Diakinesis is characterised by
  25. Base substitutions from base analogues I are called
  26. Which disease results from the genetic inability to synthesize a single enzyme ?
  27. In the Operon concept, the regulator gene regulates chemical reactions in the cell by
  28. When two genes are situated very close to each other in a chromosome
  29. Reverse transcription was discovered by
  30. The number of characters investigated by Mendel was