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Natera Panorama Practice Exam
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Which statement best defines triploidy?
Four copies of each chromosome
Two copies of each chromosome
One copy of each chromosome
Three copies of each chromosome
Reveal Answer
Correct Answer:
Three copies of each chromosome
Explanation:
Triploidy means three complete sets of chromosomes, i.e., three copies of each chromosome (3n). In humans this would total 69 chromosomes instead of the normal 46. This is a form of polyploidy, distinct from having four copies (tetraploidy), two copies (normal diploidy), or one copy (haploidy) of each chromosome. So the description of three copies of each chromosome is the correct definition.
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