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Principles of Inheritance and Variation question

2003 · Q72
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Principles of Inheritance and Variation question

2003 · Q72

NEETBiologyPrinciples of Inheritance and VariationMCQ+4 / −1
Down's syndrome is caused by an extra copy of chromosome number 21. What percentage of offspring produced by an affected mother and a normal father would be affected by this disorder ?
  1. A
    50%
  2. B
    100%
  3. C
    75%
  4. D
    25%
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