Down Syndrome is a genetic disorder in humans caused by having three copies of chromosome
21 In their cells how could a person with this disorder
have gotten an extra copy of this chromosome?
A. Replication of chromosome 21 after meiosis
B. Nondisjunction of chromosome 21 during meiosis
C. Crossing over of chromosome 21 with other chromosomes
D. Recombination of chromosome 21 with other chromosomes
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Down Syndrome is a genetic disorder in humans caused by having three copies of chromosome
21 In the...
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