Genetics Key Concepts
• DNA is a double helix molecule.
• DNA is a molecule that includes different components - sugars, nitrogenous bases, and phosphates. The arrangement of the nitrogenous bases within the double helix forms a chemical code.
• Chromosomes are strands of tightly wound DNA. Genes are sections of a chromosome that carry the code for a particular trait.
• The basic laws of Mendelian genetics explain the transmission of most traits that can be inherited from generation to generation.
• Traits that are expressed through genes can be inherited. Characteristics that are acquired through environmental influences, such as injuries or practiced skills, cannot be inherited.
• In genetic engineering, the genetic code is manipulated to obtain a desired product.
• Genetic engineering has numerous practical applications in medicine, agriculture, and biology.
• A series of contributions and discoveries led to the current level of genetic science.
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