11th Biology Chapter 10
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Cell Cycle
The cell cycle comprises various phases that ensure the duplication of the cell's content and division into two daughter cells. It includes key phases such as Interphase (Growth and DNA replication) and M Phase (Actual cell division)【4:0†source】.
M Phase
The M Phase is responsible for the physical cell division that follows DNA replication in the cell cycle. It is divided into nuclear division (karyokinesis) and cytoplasmic division (cytokinesis)【4:0†source】.
Significance of Mitosis
Mitosis leads to growth, maintenance, and tissue repair in multicellular organisms by producing two genetically identical daughter cells. It maintains the chromosome number and cell function across generations【4:1†source】.
Meiosis
Meiosis is crucial for sexual reproduction, reducing the chromosome number by half, allowing genetic diversity through crossing over and recombination, and ultimately producing gametes【4:2†source】.
Significance of Meiosis
The reduction in chromosome number during meiosis prevents doubling at fertilization, maintaining genetic stability and increasing diversity, critical for evolution and species' survival【4:2†source】.
What is the purpose of the process of meiosis in sexually reproducing organisms?
How does cytokinesis differ between plant and animal cells?
Describe the changes that occur in the chromosome structure during prophase I of meiosis.
What events take place during anaphase II of meiosis and how does it differ from anaphase I?
Explain the significance of crossing over during prophase I of meiosis.
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