In this article we will discuss about:- 1. Subject-Matter of Paramecium 2. Reproduction and Mode of Action of Paramecium 3. Origin of Paramecium. Subject-Matter of Paramecium: Sonneborn in 1943 found that Paramecium aurelia strains could be classified into “Killer” and “Sensitive” types. The killer strain secreted a toxic substance “paramecin” in the growing medium and […]
Paramecium: Origin, Particles and Reproduction
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Top 4 Examples of Cytoplasmic Inheritance
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The following points highlight the top four examples of cytoplasmic inheritance in eukaryotes. The examples are: 1. Sigma Virus of Drosophila 2. Milk Factor in Mouse 3. Maternal Sex Ratio Condition in Drosophila 4. Cytoplasmic Male Sterility (CMS). Cytoplasmic Inheritance: Example # 1. Sigma Virus of Drosophila: Normally, Drosophila is anesthetized by CO2 without any […]
Origin of Mitochondria and Chloroplasts
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The following points highlight the top two theories based on origin of mitochondria and chloroplasts. The theories are: 1. Endosymbiont Theory 2. Direct Filiation Theory. 1. Endosymbiont Theory: This theory is based on the similarities of chloroplasts and mitochondria with prokaryotic cells. These organelles possess their own genetic material (DNA) as well as the machinery […]
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