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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. A giant chromosome having many chromo-nemata lying side by side all along their length is called
  2. Crossing over in meiosis occurs in
  3. Linkage is
  4. The nuclear membrane completely disappears during
  5. A codon is a sequence of 3 nucleolides on
  6. Diakinesis is characterised by
  7. The number of characters investigated by Mendel was
  8. Albinism in com plants is best described as
  9. Among the following which is a test cross?
  10. In the Operon concept, the regulator gene regulates chemical reactions in the cell by
  11. When two genes are situated very close to each other in a chromosome
  12. The crossing of a homozygous tall plant with a dwarf would yield plants in the ratio of
  13. A pure tall pea plant was reared in a soil poor in nutrition and reached the size of a pure dwarf pea…
  14. Base substitutions from base analogues I are called
  15. The genetic constitution of an organism is known as
  16. Linked genes may be separated by the process of
  17. The science dealing with study of inheritance and variation is
  18. In humans, an example of sex-linked trait is
  19. A functional unit of a gene which specifies synthesis of one poly-peptide is known as
  20. The condition in which only one allele of a pair is present is known as
  21. Some people experience PTC paper on tongue as bitter, others as tasteless. This character is hereditary…
  22. The term 'meiosis' was coined bv
  23. An offspring of two homozygous parents different from one another by alleles at only one gene locus…
  24. The first person to induce mutations was
  25.  A person meets with an accident and great loss of blood has occurred. There is no time to analyse…
  26. How many meiosis will be required to produce 102 pollen-grains ?
  27. A child is bom with an extra chromosome in each of its cells. This is usually the result of
  28. Transfer of a gene or genes through a virus is called
  29. A colour-blind man marries the daughter of a colour-blind person. In their progeny
  30. The scientists who rediscovered the Mendel's laws are