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A member asked:
My son has a paternally inherited chromosomal duplication. his father seems unaffected, but our son has developmental delays (e.g. speech). could this be the cause even if his father is unaffected?
2 doctors weighed in across 2 answers
Yes, it is possible in chromosomal duplication. A parent with the duplication may not have any signs or symptoms.
Answered 3/21/2022
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Such defects most often occur as a new issue in the formation of the egg or sperm. They are rarely if ever inherited like eye color or other such traits.
Answered 3/22/2022
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