Biology · Principles of Inheritance and Variation
The cause of Down's syndrome in humans is:
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1The absence of a sex chromosome
- 2The absence of an autosome
- 3An extra copy of a sex chromosome
- 4An extra copy of an autosome✓
Correct answer
An extra copy of an autosome
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