Prenatal screening Screening for Down syndrome is available to about 53.5% of mothers on a maternal age basis‚ and the remaining 46.5% of health boards provide serum screening for all ages. There are several methods used in prenatal screening‚ these are usually used separately‚ and a number of factors are taken into account to determine which method should be used. Amniocentesis has been around for 20 years and is probably the most well known screening method. It involves testing a sample of the
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Patau syndrome is a disorder that occurs due to the appearance of a person’s thirteen chromosome three times (trisomy 13) instead of only twice in the cell. In some cases of the disorder‚ only a select percentage of the cells display the third thirteen chromosome while others contain the average amount of pairs‚ this is known as mosaicism. The extra chromosomal material in the cell can lead to many problems in the developmental stages of the humans life‚ these developmental issues cause severe mental
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Deanna Kitzke Wrongful Conception Hwang-Ji Lu HCA 322: Health Care Ethic & Medical Law April 5‚ 2010 Wrongful Conception The traditional way of doing things in America goes as follows; you meet Mr. or Mrs. Right‚ you get married‚ buy a house and have a family. After having all the children that one family wants someone in the relationship makes the responsible decision to be permanently sterilized or continue using birth control until menopause. Being permanently sterilized means‚ having
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Down’s Syndrome Down’s syndrome is a genetic condition involving an extra chromosome‚ this change occurs around the time of conception. A person with Down’s syndrome has forty-seven chromosomes instead of the usual forty-six. A relatively common genetic disorder‚ Down’s strikes 1 out of 600 babies. In 95 percent of all cases‚ the disorder originates with the egg‚ not the sperm‚ and the only known risk factor is advanced maternal age-at age 35‚ a woman has 1 chance in 117 of having a baby with
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HGD Midterm Study Guide 1. The Christian doctrine of ________ is the basis for the theory that human development occurs as a result of how well or how poorly someone does at overcoming their innately sinful nature a. original sin 2. Who was the philosopher who believed that children are born with a mind which is a blank slate? a. John Locke 3. Juanita’s father died when she was just a baby‚ but her family insists that she not only looks like him‚ she acts like him as well. This might indicate
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separate during stage 2. One daughter cell will receive both sister chromosomes and the other will receive none. This results in the former cell having three chromosomes containing the same genes (two sisters and a homologue)‚ a condition known as trisomy‚ and the latter cell having only one chromosome (the homologous chromosome)‚ a condition known as monosomy. These cells are considered aneuploid‚ a condition often associated with cancer. Mitosis is a demanding process for the cell‚ which goes through
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Bio 311D Exam 1 2. Be able to use these terms correctly: DNA molecule‚ chromosome‚ chromatid‚ homologous pair. DNA molecule – A double-stranded‚ helical nucleic acid molecule‚ consisting of nucleotide monomers with a deoxyribose sugar and the nitrogenous bases adenine (A)‚ cytosine (C)‚ guanine (G)‚ and thymine (T); capable of being replicated and determining the inherited structure of a cell’s proteins Chromosome - A cellular structure carrying genetic material‚ found in the nucleus
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Regulation of gene expression Transcription -the process of creating a complementary RNA copy of a sequence of DNA. Translation - messenger RNA (mRNA) is decoded by the ribosome to produce a specific amino acid chain‚ or polypeptide‚ that will later fold into an active protein. Epigenetic refers to all heritable changes in gene expression and chromatin organization that are independent of the DNA sequence itself. Epigenetic inheritance is an essential mechanism that allows the stable propagation
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Natural Selection Paper Natural selection is considered one of the most important processes for a variety of species and the environment which allows the fittest organisms to produce offspring. To prevent a species from extinction‚ it is necessary for them to adapt to the surrounding environment. The species which have the ability to adapt to new surroundings will be able to pass their genes through reproduction. Within the process of natural selection‚ it is possible for the original genetic make-up
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affects the brain‚ face‚ and sometimes the body. This genetic mutation is present while the child is still in the embryonic stage of development in the mother’s womb. The most identifiable mutation is caused by the addition of chromosome thirteen or trisomy thirteen. In other cases HPE is caused by abnormalities in the genes SHH‚ SIX3‚ TGIF‚ ZIC2‚ PTCH1‚ FOXH1‚ NODAL‚ CDON‚ and GLI2. These genes play an important role in the embryo’s development in the womb. When these genes malfunction and cause
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