Assuming mitosis is divided into prophase, prometaphase, metaphase, anaphase, and telophase, identify the events that take place in prometaphase. Microtubules attach to kinetochores. All chromosomes are aligned on the metaphase plate. The nucleolus disappears. Chromosomes condense. Sister chromatids split. The chromosomes move toward the equator by action of the kinetochore microtubules. Centrioles U U U replicate. The nuclear envelope disappears. Spindle fibers form.
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:
Mitosis is a type of cell division resulting in the formation of two daughter cells that are similar to parental cells. It involves 6 major stages which are as,
- Prophase
- Prometaphase
- Metaphase
- Anaphase
- telophase
- Cytokinesis
During the prophase stage chromatin condensation begins, the nuclear envelope starts to break down and the nucleolus disappears.
During Prometaphase, the chromatin condensation continues and microtubules attach on chromosomes, further centrosomes start to move towards the opposite poles.
During Metaphase, the chromosomes align at the center of the cell at the metaphase plate.
During Anaphase, the paired chromosomes separate and start to move toward the opposite poles.
During telophase, the chromatids reach opposite poles and the daughter cell is surrounded by new membranes.
During Cytokinesis the parental cell separates into two daughter cells.
Step by step
Solved in 4 steps
