... cloning. A scientist would take an ovum from a female donor, removing the nucleus and thus leaving an "empty" egg. From there, a single skin cell (somatic cell) would be removed from either, or both, parents and the nucleus from these somatic cells would then be inserted into the " ... This number could be largely reduced worldwide through the process of Therapeutic Cloning. Starting out quite similarly to adult DNA cloning, with a nucleus inserted into an empty egg. But rather than allowing the egg carry out the process of development into a child, it's growth would be stopped around the...

• Word Count: 995
• Approx Pages: 4
• Grade Level: Undergraduate

... Genetic information is the complete set of inherited instructions, or an organism's genome, for building proteins and other molecules. Inside the nucleus of each mammalian cell are pairs of chromosomes that are composed of deoxyribonucleic acid (DNA). This long, helical molecule carries all the information to direct the production of proteins. Biologists were convinced that chromosomes carry genes and genetic information, but ... in the nucleus of a cell. Nucleotide base pairs (A, T, G, and C) bond to the sugar-phosphate backbone to form the DNA double-helix molecule. The spiral helix, wi...

• Word Count: 2575
• Approx Pages: 10
• Has Bibliography
• Grade Level: Undergraduate

... ethics. Many couples who are unable to have children turn to fertility-enhancing technologies for help. Artificial insemination raised new ethical issues about how potential parents should choose sperm or egg donors, on what basis and with what guarantees of privacy should donors be enlisted, and whether donors are able to have parental rights. In 1978 the birth of the first ... inside the recipient's body rather than a freezer. It might be possible to create a new embryo using nuclear transfer technology, where the new embryo would contain the DNA of the one used in the stem cell thera...

• Word Count: 2467
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• Grade Level: Undergraduate

... second meiotic division of spermatogenesis" according to Dr. Robert Tissot. If chromosomes fail to separate before turning into gametes, every sperm cell will be afflicted with an extra Y chromosome. Symptoms of XYY syndrome are unusual height, average to low IQ's, and an increase ... the most affected part of the cell. In a normal cell, the nucleus contains 46 chromosomes, 23 from the egg and 23 from the sperm. In contrast, a cell infected with XYY syndrome will have 47 chromosomes in the nucleus, 23 from the egg and 24 from the sperm. This ... extra chromosome is passed onto the zygote...

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• Has Bibliography
• Grade Level: Undergraduate

... technology probably will make possible changes in the genomes of embryos. Parents that risk having children with genetic diseases will be able to have the DNA of their prospective children repaired at the embryo stage, protecting them against maladies such as cystic fibrosis, PKU, and Tay-Sachs. A further ... for a leukemia patient could be created from the patient's own cells. Doctors could take a skin cell nucleus and implant it in an enucleated human egg2, resetting the cell's DNA. Once reset, the cell could become and embryonic stem cell3. After the ES (embryonic stem) cells began to...

• Word Count: 2464
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• Has Bibliography
• Grade Level: Undergraduate

... transfer involves the use of two cells. The receiving cell is normally an unfertilised egg taken from an animal soon after ovulation. The donor cell is the one to be copied. A scientist removes the chromosomes, a chain-like substance that incorporates the cell's DNA, from the recipient egg cell. The donor cell is then combined with the recipient egg. Some fused cells start to develop like a normal ... embryo and produce progeny if implanted into the uterus of a surrogate mother'. Then on October 13th 2001, human cloning research had an even bigger breakthrough. Cloned early-stage human ...

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• Grade Level: Undergraduate

... provide the codes that are used in translation to make proteins that do functions of the cell. In 1972 Paul Berg created the first Recombinant DNA. Berg did an experiment where he was able to put different DNA into cells so they would produce a different kind of protein they had not made in ... the past. In 1975 these technologies were used to develop the Southern Blotting Method for finding detecting specific DNA sequences, which has been commonly been used in proving guilt or innocence of the suspect. If there was a struggle at a murder scene between the ... the protein does, a ways i...

• Word Count: 1423
• Approx Pages: 6
• Grade Level: Undergraduate

... would be to replace the haploid nucleus of the host egg with a donor's nucleus containing a full set of genes. Applying an electrical current would then jolt the host egg into beginning growth. If implanted in a surrogate mother, the egg could then continue through its nine-month gestation period. ... grieving parents the chance to recapture the child they have lost. A lock of hair taken from a baby book could provide the DNA necessary for cloning their daughter. Although the clone would obviously not have an identical personality to it genetic predecessor, the two would more ... actua...

• Word Count: 1094
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• Has Bibliography
• Grade Level: Undergraduate

... when cells are unable to produce necessary proteins needed to change certain chemicals into others or to carry substances from one place to another. The cell's inability to carry out these functions often results in mental retardation. Almost 1 in every 5000 children is born with defective enzymes resulting in this ... include cancer, high blood pressure, heart disease, diabetes, Alzheimer's disease, and obesity. Chromosomes are structures made up of DNA and protein. They are located in the nucleus of each cell. Because chromosomes are carriers of the genome, such abnormalities in chromos...

• Word Count: 354
• Approx Pages: 1
• Grade Level: Undergraduate