Oogenesis
The formation of the ovum (mature female gamete) from undifferentiated germ cells is called oogenesis. This process takes place in the ovaries (female gonads). Oogenesis consists of three stages known as the multiplication phase, growth phase, and maturation phase.
Cell Division
Cell division involves the formation of new daughter cells from the parent cells. It is a part of the cell cycle that takes place in both prokaryotic and eukaryotic organisms. Cell division is required for three main reasons:
Is there any technique can quickly expand one set of cell chromosome?
The genetic material of an organism that it inherits from the parents is known as deoxyribonucleic acid (DNA). The DNA is packed to form a complex thread-structure that is called the chromosome. Thus the DNA is tightly coiled around the histone proteins to form the chromosome.
The process of chromosome doubling is performed generally in the plant cells to induce polyploidy. Polyploidy is a condition in which the cells of an organism consist of more than one chromosome.
The chemical called colchicine is used for the process of chromosome doubling in plants.
- The initial step is transferring the plant to the rooting medium.
- A combination of colchicine and dimethyl sulfoxide is used for the treatment of the plant.
- The roots of the plant are submerged in this solution for about 5 hours under the presence of light and temperature is maintained at 20℃.
Thus the technique of using colchicine quickly produces chromosomedoubling of the cell.
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