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Cell organelles

  Cell organelles are the bustling metropolises within the microscopic world of cells. Each organelle, like a specialized district, performs a crucial function, contributing to the overall city-like operations of the cell. Let's embark on a detailed tour of these fascinating microscopic marvels: The Nucleus: The City's Brain Trust Imagine a majestic library, housing the city's blueprints and governing all its activities. That's the nucleus, the control center of the cell. Its double membrane protects its precious cargo: DNA, the genetic code that dictates every aspect of the cell's life. Within the nucleus reside nucleoli, ribosome factories responsible for protein synthesis. The nucleus orchestrates cell division, ensuring the city's growth and renewal. Mitochondria: The Powerhouse District Think of a bustling power plant, constantly generating energy to keep the city running. That's the mitochondrion, the powerhouse of the cell. It harnesses nutrients...
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Nature and scope of genetics

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Nature and Scope of Genetics Genetics is the fascinating field of biology that unravels the mysteries of heredity and variation in living organisms. It explores how traits are passed down from parents to offspring, how genetic diversity arises, and how genes influence an organism's form, function, and health. Nature of Genetics: DNA as the blueprint of life: At its core, genetics revolves around the study of deoxyribonucleic acid (DNA), the molecule that carries genetic information. DNA is like a long instruction manual, made up of units called genes, which determine the inherited characteristics of an organism. Opens in a new window www.pixtastock.com DNA molecule structure Gene expression and protein synthesis: Genes don't directly control traits; they code for proteins, the workhorses of the cell. The process by which genetic information encoded in DNA is translated into proteins is called gene expression. Proteins determine...
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Genetical inheritance

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  Genetic inheritance is the fundamental process by which living organisms pass their traits from one generation to the next. It's the reason why children often resemble their parents, sharing physical characteristics like eye color, hair texture, and height. But inheritance is much more than just passing down physical traits. It also plays a role in determining our personality, intelligence, and even susceptibility to certain diseases. Opens in a new window www.khanacademy.org DNA double helix The basic unit of inheritance is the gene. Genes are made up of DNA, a molecule that stores genetic information in the form of a code. This code is made up of four chemical bases: adenine (A), guanine (G), cytosine (C), and thymine (T). The order of these bases determines the specific instructions for building and maintaining an organism. Each organism inherits two copies of each gene, one from each parent. These genes can be either dominant or recessive. A dominant gene will always ...
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