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Heredity and Genetics

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Chromosomes are composed of DNA.
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T
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Genetic research and testing includes __________.
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All of the above
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Which of the following statements BEST describes chromosomes?
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Chromosomes carry the codes for hereditary traits.
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Genes are segments of a chromosome that are responsible for specific hereditary traits.
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T
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Amniocentesis is a test in which fluid is removed from the uterus so the baby’s genetic composition can be determined.
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T
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Complex diseases are caused by imperfections in multiple genes.
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T
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Gene testing is foolproof since it scans the building blocks of humans.
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F
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Gene therapy is a commonly used process whereby normal genes are injected to replace abnormal genes.
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T
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Sickle cell anemia is most common in people of Northern European descent.
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F
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Understanding and anticipating genetic disorders can help to manage hereditary diseases.
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T
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Discuss the general causes of chromosomal diseases.
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Chromosomal diseases occur when an abnormality occurs. These could include either the wrong number of chromosomes or an incomplete chromosome.
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Complex genetic diseases are different from single-gene diseases because they __________.
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Are caused by mutations to multiple genes
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Explain the causes and symptoms of sickle cell anemia.
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Sickle cell anemia is caused by the red blood cells’ inability to properly form hemoglobin. The result is an inability to transfer oxygen and blood throughout the body.
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Hereditary diseases are passed from one generation to the next through mutated genes.
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T