Anaphase in Mitosis and Meiosis (Anaphase I, II)

Anaphase in Mitosis and Meiosis

Anaphase Definition This is the phase that separates duplicate genetic materials that are carried in the nucleus of the parent cell, into the two identical daughter cells. In the previous phase, metaphase, the sister chromatids (replicated chromosomes) are aligned along the cell’s equator on the metaphase plate. Therefore, during anaphase, each pair of chromosomes separates into two identical but independent …

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Eukaryotic Cells- Definition, Characteristics, Structure, Examples

Eukaryotic Cells

Eukaryotic Cells Definition Eukaryotic cells are the cells that are complex in structure and function as they have a membrane-bound well-defined nucleus and other membrane-bound organelles. The term “eukaryote” is derived from Greek words, “eu” meaning ‘true’ and “karyon’ meaning ‘nucleus.’ Eukaryotic cells have a more advanced structural composition when compared to prokaryotes. By virtue of these advancements, eukaryotic cells …

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Apoptosis- definition, pathways, assay, examples (vs Necrosis)

Apoptosis

What is Apoptosis? Apoptosis is a normal genetically programmed cell death where an aging cell at the end of its life cycle shrinks and its remaining fragments are phagocytosed without any inflammatory reaction. The term apoptosis was first introduced in a paper in 1972 by Kerr, Wyllie, and Currie to describe a morphologically distinct type of cell death. It consists …

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Epithelial tissue vs Connective tissue- Definition, 15 Differences, Examples

Differences between epithelial tissue and connective tissue

Epithelial Tissue Definition Epithelial tissue is a type of animal tissue, consisting of closely aggregated polyhedral cells connected firmly to one another in the form of cellular sheets that line the interior of hollow organs and cover the body surface. Cells in epithelial tissue or epithelium (epithelia; plural) are arranged in continuous sheets, in either single or multiple layers. The …

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Neutrophils – Definition, structure, count, range, functions

Neutrophils - Definition, structure, count, range, functions

Neutrophils Definition Neutrophils are a type of white blood cell with multi-lobed nuclei and stainable cytoplasmic granules. These are the most abundant granulocytes, occupying about 40-60% of the total number of white blood cells in the blood. Neutrophils, like all other blood cells, are formed from the stem cells in the bone marrow. After differentiation in the bone marrow, neutrophils …

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Metaphase in Mitosis and Meiosis (Metaphase 1 and 2)

Metaphase in Mitosis and Meiosis (Metaphase 1 and 2)

Metaphase definition Metaphase is a stage of the cell cycle occurring in both mitosis and meiosis cell division processes. During metaphase in mitosis and meiosis, the chromosomes condense and they become visible and distinguishable during alignment at the center of the dividing cell, to form a metaphase plate at the center of the cell. In this phase, a series of …

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Prophase in mitosis and meiosis (Prophase 1 and 2)

Prophase in mitosis and meiosis (Prophase 1 and 2)

Prophase Definition Prophase is the phase that follows the interphase and typically the first and longest phase in the cell cycle, for both mitosis and meiosis. It is the phase of DNA unwinding and chromatin condensation to make the chromosomes visible. What Happens in Prophase? During prophase, the separation of the DNA that was synthesized in the interphase phase takes …

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Interphase- definition, stages, cell cycle, diagram, video

The Stages of Interphase and the Cell Cycle

What is Interphase? Cells continuously undergo cell division through which daughters cells arise which mature and also produce their own daughter cells and the cycle continues. The events of the cell cycle involve cell growth and cell division, of which the interphase defines the phase of cell growth where several metabolic reactions take place. The interphase is the preparation phase …

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Osmosis- definition, types, examples, (Osmosis vs Diffusion)

Osmosis

Osmosis Definition Osmosis is a biophysical process occurring commonly in biological systems where solvent molecules move across a semi-permeable membrane towards a region of high solute concentration. Figure: Osmosis. Image Source: Open Stax (Rice University) and Biology Online. It is a type of passive transport and is directed towards the direction that tends to equalize the solute concentration across a …

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Pinocytosis- definition, steps, types, examples, (vs phagocytosis)

Pinocytosis and Phagocytosis

Pinocytosis definition Pinocytosis is a type of endocytosis in which small particles suspended in the extracellular fluid are moved into the cell through pores formed on the cell membrane. The term pinocytosis is formed of two words “pino” and cytosis” where ‘pino’ means “to drink” while ‘cytosis’ means relating to the cell. It is a continuous process in most cells …

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