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The number of characters investigated by Mendel was

A. four

B. seven

C. six

D. one

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  1. In a monohybrid cross the Fi ratio of a backcross is
  2. Exhibition of superiority by a hybrid over both of its parents is called
  3. Base substitutions from base analogues I are called
  4. DNA duplication occurs in
  5. An offspring of two homozygous parents different from one another by alleles at only one gene locus…
  6. A codon is a sequence of 3 nucleolides on
  7. The term 'meiosis' was coined bv
  8. How many meiosis will be required to produce 102 pollen-grains ?
  9. Colour blindness is caused due to
  10. In the Operon concept, the regulator gene regulates chemical reactions in the cell by
  11. Linkage is
  12. The crossing of a homozygous tall plant with a dwarf would yield plants in the ratio of
  13.  A person meets with an accident and great loss of blood has occurred. There is no time to analyse…
  14. The best method to determine whether an individual is homozygous or heterozygous is
  15. The condition in which only one allele of a pair is present is known as
  16. The nuclear membrane completely disappears during
  17. Chromosomes exhibit minimum coiling during
  18. A colour-blind man marries the daughter of a colour-blind person. In their progeny
  19. Mutations which are not dominant are not lost by a gene pooL This is known as
  20. Some people experience PTC paper on tongue as bitter, others as tasteless. This character is hereditary…
  21. Down's syndrome is an example of
  22. Lethal genes are those which
  23. A child is bom with an extra chromosome in each of its cells. This is usually the result of
  24. Which one of the following chemical characteristics is not common to all living beings ?
  25. The genetic constitution of an organism is known as
  26. When two genes are situated very close to each other in a chromosome
  27. The possibilities of hereditary and evolutionary changes are greatest in species that reproduce by
  28. Which disease results from the genetic inability to synthesize a single enzyme ?
  29. In humans, an example of sex-linked trait is
  30. The chromosomal theroy of heredity implies that