Concept explainers
To explain: The requirement to use genetic testing to check the disease in an embryo before the technique of the in-vitro fertilization, analysis of the embryo for testing to check for traits unrelated to the diseases. The analysis of the feasibility of performing the genetic tests and to draw a line of conclusion for the genetic tests which are acceptable and which are not.
Introduction: The genetic testing by the procedure of amniocentesis is done to analyze the diseases in the embryo. In this technique, a small amount of amniotic fluid is extracted from the embryo sac layer inside the uterus of the mother and diagnosed for the pre-natal diseases. The technique of in-vitro fertilization is used for fertilizing the egg with a sperm in a test-tube and implanting the egg in the uterus of the mother at the eight-celled stage.
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Campbell Essential Biology with Physiology (5th Edition)
- A defective gene on chromosome 15 causes Tay-Sachs disease. It is a central nervous system neurodegenerative disease that most often affects infants, though older children and adults can have late-onset forms of the disease. The defective gene prevents the body from making a protein called hexosaminidase A. Without, hexosaminidase A, chemicals called gangliosides build up in the nerve cells of the brain, destroying brain cells.A couple has one daughter with Tay-Sachs disease and three other unaffected children. Neither the mother, nor father, nor any of the biological grandparents of the affected daughter have had the disease. Tay-Sachs disease most likely demonstrates what type of inheritance? Select one: a. autosomal dominant b. X-linked recessive c. X-linked dominant d. autosomal recessivearrow_forwardA defective gene on chromosome 15 causes Tay-Sachs disease. It is a central nervous system neurodegenerative disease that most often affects infants, though older children and adults can have late-onset forms of the disease. The defective gene prevents the body from making a protein called hexosaminidase A. Without, hexosaminidase A, chemicals called gangliosides build up in the nerve cells of the brain, destroying brain cells.A couple has one daughter with Tay-Sachs disease and three other unaffected children. Neither the mother, nor father, nor any of the biological grandparents of the affected daughter have had the disease. Tay-Sachs disease most likely demonstrates what type of inheritance? Pedigree information regarding the incidence of Tay-Sachs within a family is depicted above. The row below that indicates the genotypes of individuals II-1, II-2, and III-1 is Select one: a. II-1 II-2 III-1 Aa Aa aa b. II-1 II-2 III-1 XAY XAXa XAXa c. II-1 II-2 III-1…arrow_forwardWhich of the following genetic changes would be passed from parent to child? A duplication of chromosome 21 during mitosis in a pancreas cell The addition of a chromosome in an egg cell A mutation in a skin cell caused by UV light A translocation in a nonhomologous pair of chromosomes in a liver cellarrow_forward
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