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A member asked:
Is down syndrome sex linked/recessive/or dominant?
A doctor has provided 1 answer
None of the above: Down syndrome happens when an extra 21 chromosome is present in all the cells of the body. It happens before conception when the donor egg fails to shed one of its 21 chromosomes in the formation of the egg; the male 21 joins the female pair & creates an embryo with 3 number 21's. It has nothing to do with traits or mutations in the gene code.
Answered 2/21/2020
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Related Questions
A member asked:
I was wondering is Down syndrome dominant or recessive?
A doctor has provided 1 answer
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I am doing a presentation for my class on down syndrome and I need to know why it isn't dominant or recessive. P.S. I need a simplified answer
4 doctors weighed in across 2 answers
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