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When is the sex of an offspring decided

A. At ovulation

B. During meiosis

C. During cleavage

D. At fertilization

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  1. Diakinesis is characterised by
  2. Among the following which is a test cross?
  3. Transfer of a gene or genes through a virus is called
  4.  A person meets with an accident and great loss of blood has occurred. There is no time to analyse…
  5. Some people experience PTC paper on tongue as bitter, others as tasteless. This character is hereditary…
  6. A child is bom with an extra chromosome in each of its cells. This is usually the result of
  7. The science dealing with study of inheritance and variation is
  8. The best method to determine whether an individual is homozygous or heterozygous is
  9. In a monohybrid cross the Fi ratio of a backcross is
  10. The scientists who rediscovered the Mendel's laws are
  11. In the Operon concept, the regulator gene regulates chemical reactions in the cell by
  12. Base substitutions from base analogues I are called
  13. Colour blindness is caused due to
  14. Reverse transcription was discovered by
  15. In humans, an example of sex-linked trait is
  16. The chromosomal theroy of heredity implies that
  17. Albinism in com plants is best described as
  18. How many meiosis will be required to produce 102 pollen-grains ?
  19. Chromosomes exhibit minimum coiling during
  20. The possibilities of hereditary and evolutionary changes are greatest in species that reproduce by
  21. A codon is a sequence of 3 nucleolides on
  22. The condition in which only one allele of a pair is present is known as
  23. When two genes are situated very close to each other in a chromosome
  24. Down's syndrome is an example of
  25. The segment of DNA which participates in crossing over is known as
  26. Which one of the following chemical characteristics is not common to all living beings ?
  27. Dyad is
  28. The term 'meiosis' was coined bv
  29. The crossing of a homozygous tall plant with a dwarf would yield plants in the ratio of
  30. A giant chromosome having many chromo-nemata lying side by side all along their length is called