By Michael Anderson
Even if we regularly seek social and historic records for clues to our earlier, organic files probably carry an important proof of our historical past. The qualities we inherit from our mom and dad and go directly to our offspring are encoded in our genes and DNA and show a lot approximately either our origins and our destiny. This quantity examines the interesting biology at the back of genetics and genetic problems. It additionally rigorously considers the rules of gene manipulation and genetic engineering whose strength to revolutionize drugs, undefined, and agriculture is changing into more and more glaring with each new discovery.
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Additional resources for A Closer Look at Genes and Genetic Engineering (Introduction to Biology)
China Photos/Getty Images with a genetic component. Because of the multiple factors involved in these disorders, the pattern of inheritance in families is less clear than that observed for single-gene and chromosomal disorders. 53 C hapter 4 The Practice of Genetic Engineering A lmost every living cell holds a vast storehouse of information encoded in genes. The artificial manipulation of one or more genes to modify an organism is called genetic engineering. The term genetic engineering initially encompassed all of the methods used for DNA contains two strands of nucleotides linked together by chemical bonds.
30 Genetics: The Study of Genes Polygenic Traits and Multifactorial Inheritance The expression of most traits results from the interaction of several genes and with environmental factors such as nutrition. Traits affected by more than one gene are sometimes called polygenic traits. Because their expression is affected by many factors, they are said to follow a multifactorial pattern of inheritance. Common examples include height and hair color in humans, coat color in dogs and other animals, milk yield in cattle, egg-laying capacity in poultry, and immune system function in all mammals.
Without it, no cell or tissue could live beyond a short period of time. For example, red blood cells, which live for only about 120 days, and skin cells, which on average live for only about 17 days, must be renewed to maintain the viability of the human body. It is within the genome that the basic 42 The Nature of Chromosomes and Genes information for the renewal of these cells, and many other types of cells, is found. The human genome is not uniform. Except for identical twins, no two humans on Earth share exactly the same genomic sequence.
A Closer Look at Genes and Genetic Engineering (Introduction to Biology) by Michael Anderson