Read e-book online A Closer Look at Genes and Genetic Engineering (Introduction PDF

By Michael Anderson

ISBN-10: 1615305769

ISBN-13: 9781615305766

Even though we frequently seek social and old records for clues to our prior, organic records possibly carry crucial facts of our background. The characteristics we inherit from our mom and dad and go directly to our offspring are encoded in our genes and DNA and display a lot approximately either our origins and our destiny. This quantity examines the interesting biology in the back of genetics and genetic problems. It additionally conscientiously considers the rules of gene manipulation and genetic engineering whose strength to revolutionize drugs, undefined, and agriculture is turning into more and more glaring with each new discovery.

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By Michael Anderson

ISBN-10: 1615305769

ISBN-13: 9781615305766

Even though we frequently seek social and old records for clues to our prior, organic records possibly carry crucial facts of our background. The characteristics we inherit from our mom and dad and go directly to our offspring are encoded in our genes and DNA and display a lot approximately either our origins and our destiny. This quantity examines the interesting biology in the back of genetics and genetic problems. It additionally conscientiously considers the rules of gene manipulation and genetic engineering whose strength to revolutionize drugs, undefined, and agriculture is turning into more and more glaring with each new discovery.

Show description

Read or Download A Closer Look at Genes and Genetic Engineering (Introduction to Biology) PDF

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Extra info for A Closer Look at Genes and Genetic Engineering (Introduction to Biology)

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This process is repeated every time cells divide. Meiosis Gamete formation occurs through a form of cell division called meiosis. During this process, the amount of hereditary material present in the gametes is reduced by half. Meiosis consists of two divisions. In the first division, the homologous chromosomes pair up and duplicate themselves, then each pair moves away from the other as the cell divides, producing two daughter cells, each with a diploid chromosome set. The daughter cells undergo a second division similar to mitosis, during which the chromosomes do not duplicate but merely separate.

RNA, which contains uracil (U) instead of thymine, carries the code to protein-making sites in the cell. To make RNA, DNA pairs its bases with those of the “free” nucleotides (Figure 2). Messenger RNA (mRNA) then travels to the ribosomes in the cell cytoplasm, where protein synthesis occurs (Figure 3). The base triplets of transfer RNA (tRNA) pair with those of mRNA and at the same time deposit their amino acids on the growing protein chain. Finally, the synthesized protein is released to perform its task in the cell or elsewhere in the body.

One type of cut produces two DNA strands with blunt ends; that is, there is no overhang on one strand or the other. A second type of cut produces two strands with sticky ends; because of the site of cleavage, each strand extends beyond the complementary region of the strand pair. The ends are not actually sticky. Rather, the term denotes that the overhang allows these fragments to bind more readily with other strands. Blunt ends are more difficult to join. Encyclopædia Britannica, Inc. Recombinant DNA Technology Genetic engineers use restriction enzymes to remove a gene from a donor organism’s chromosome and insert it into a vector, a 60 The Practice of Genetic Engineering Recombinant DNA is formed by using a restriction enzyme that cuts the double strand at a particular point.

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A Closer Look at Genes and Genetic Engineering (Introduction to Biology) by Michael Anderson


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