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People with Down syndrome usually have ______ of the 21st chromosome. monosomy diploidy haploidy trisomy
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5 votes
People with Down syndrome usually have ______ of the 21st chromosome.

monosomy

diploidy

haploidy

trisomy

User Yossico
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2 Answers

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People with Down syndrome usually have trisomy of the 21st chromosome.
User EugeneMi
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It is caused by a trisomy in the 21st chromosome 
User Pradeek
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