21p 21g 1. You performed SNP microaray genotyping on a child diagnosed with Down syndrome and his parents. Only the markers close to the centromere of chromosome 21 are shown. What can you conclude from these data? A. Father т a. Nondisjunction occurred in the father during meiosis 1 b. Nondisjunction occurred in the father during meiosis 2 c. Nondisjunction occurred in the mother during meiosis 1 d. Nondisjunction occurred in the mother during meiosis 2 e. The child does not have trisomy 21. A. Mother Child 2. What does the Philadelphia chromosome refer to?

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A: Please follow steps 2,3,4 for detailed explanation.

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A:

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