Genetic Disorders

Each year a number of children are born with biologic defects that impair linguistic rule function. For THREE of the following conditions, discuss much(prenominal) aspects as the biological cause, the methods of treatment and possible means of sensing and/or prevention.

One lethal disorder acquireed as a recessive allele is Tay-Sachs disease. This is caused by a impaired enzyme that fails to run down down brain lipoids of a certain class. The symptoms ordinarily become manifest a few months after birth. both(prenominal) symptoms are seizures, blindness and degeneration of motor and mental performance. last is the result of this disease, in children. With Tay-Sachs disease, the brain cells of a queer are unable to metabolize gangliosides, a type of lipid, because a crucial enzyme does not work properly. As the lipids accumulate in the brain, the brain cells gradually cease to function normally. Only children who inherit two copies of the Tay-Sachs allele qualifies as a recessive. At the biochemical level, we observe an intermediate phenotype characteristic of incomplete ascendency: The enzyme deficiency that causes Tay Sachs disease can be detected in heterozygotes, who have an activity level of the lipid-metabolizing enzyme that is intermediate between individuals homozygous for the normal allele and individuals with Tay-Sachs disease. Heterozygotes lack symptoms of the disease, apparently because one-half the normal amount of functional enzyme is sufficient to prevent lipid accumulation in the brain. In fact, heterozygous individuals produce fitted numbers of normal and dysfunctional enzyme molecules. At the molecular level, the normal allele and the Tay-Sachs allele are codominant.

Sickle-cell disease is caused by the substitution of a single amino acid in the hemoglobin protein of red blood cells.



When the oxygen content of an bear upon individuals blood is low, the sickle-cell hemoglobin deforms the red cells to a sickle shape. Sickling of the cells,

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Very interesting essay! I watch with bubsie about some of the big words, it can help readers to break them down a bit. Of course, sometimes these essays are only meant for a teacher and this can change the writing style. :)

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