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Ch 17 daily grade assignment_1

Ch 17 daily grade assignment_1 - Name Jazlene Garcia Bio...

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Name: Jazlene Garcia Bio 1306 MWF 8:00 am Chapter 17: Daily grade. Due Friday April 11. Please print and bring to class. Do not e-mail your assignments. As you read Chapter 17.1, fill in this chart to organize and learn the basics of these genetic diseases: Disease Symptom Cause/treatment? Inheritance Pattern/ incidence rate PKU Within the first few weeks of life a person will began to show neurologic disturbances such as epilepsy. Signs include skeletal changes such as a small head, short stature, and flat feet. PKU sufferers may also have a skin disorder called eczema. Phenylketonuria (PKU) is a hereditary disease that is caused by the lack of a liver enzyme required to digest phenylalanine. Treatment of PKU is the elimination of phenylalanine from the diet, which is commonly found in protein-containing foods such as meat. The gene defect for phenylketonuria is an autosomal recessive genetic trait and is unknowingly passed down from generation to generation. This faulty gene usually emerges when two carriers have children together and pass it to their offspring. For each pregnancy of two such carriers, there is a 25% chance that the child will be born with the disease and a 50% chance that the child will be a carrier for the gene defect. The frequency of PKU in the United States is currently considered to be one per 10,000 to one per 12,000 live births. Sickle-cell Blocked blood vessels that can cause pain, serious infections, and organ damage. People with sickle cell disease have red blood cells that contain mostly hemoglobin* S, an abnormal type of hemoglobin. Sometimes these red blood cells become sickle-shaped (crescent shaped) and have difficulty passing through small blood vessels. There are excellent treatments for the symptoms and Sickle cell anemia is an inherited, lifelong condition. People who have sickle cell anemia are born with it. They inherit two copies of the sickle cell gene, one from each parent. People who inherit a sickle cell gene from one parent and a normal gene from the other parent have a condition called sickle cell trait. About 1 in 655 African American are homozygous for the sickle allele and have the disease.
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complications of the condition, but in most cases there’s no cure.
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