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Down syndrome is caused by an extra or part of an extra 21st chromosome while Turner syndrome is caused by an absence in one or part of the sex(X) chromosome.

Down syndrome can occur in both male and femalewhile Turner syndrome only occurs in female.

People with Down syndrome tend to have a lower than average cognitive ability.

Both Down syndrome and Turner syndrome are at higher risk for having medical conditions such as heart problems.

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Q: What are the similarities and differences between Down syndrome and Turner syndrome?
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