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English, 14.07.2021 22:10 oliviaboils

How does the karyotype of a person with Down syndrome differ from a normal karyotype?
A It lacks a chromosome.
B It has two sex chromosomes.
C It occurs in XO individuals.
D It has an extra copy of a chromosome.

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How does the karyotype of a person with Down syndrome differ from a normal karyotype?
A It la...

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