Home

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.

You can do it
  1.  A person meets with an accident and great loss of blood has occurred. There is no time to analyse…
  2. In humans, an example of sex-linked trait is
  3. Dyad is
  4. Mutations which are not dominant are not lost by a gene pooL This is known as
  5. An offspring of two homozygous parents different from one another by alleles at only one gene locus…
  6. Klinefelter's syndrome is developed when the chromosome in male is
  7. The genetic constitution of an organism is known as
  8. The number of characters investigated by Mendel was
  9. Transfer of a gene or genes through a virus is called
  10. DNA duplication occurs in
  11. How many meiosis will be required to produce 102 pollen-grains ?
  12. Exhibition of superiority by a hybrid over both of its parents is called
  13. Some people experience PTC paper on tongue as bitter, others as tasteless. This character is hereditary…
  14. The crossing of a homozygous tall plant with a dwarf would yield plants in the ratio of
  15. Colour blindness is caused due to
  16. The nuclear membrane completely disappears during
  17. The possibilities of hereditary and evolutionary changes are greatest in species that reproduce by
  18. In a monohybrid cross the Fi ratio of a backcross is
  19. A giant chromosome having many chromo-nemata lying side by side all along their length is called
  20. A codon is a sequence of 3 nucleolides on
  21. Which one of the following chemical characteristics is not common to all living beings ?
  22. Lethal genes are those which
  23. The segment of DNA which participates in crossing over is known as
  24. Albinism in com plants is best described as
  25. When two genes are situated very close to each other in a chromosome
  26. The best method to determine whether an individual is homozygous or heterozygous is
  27. When is the sex of an offspring decided
  28. Chromosomes exhibit minimum coiling during
  29. The scientists who rediscovered the Mendel's laws are
  30. A functional unit of a gene which specifies synthesis of one poly-peptide is known as