There is no definitive scientific research that indicates that Down syndrome is caused by environmental factors or the parents activities before or during pregnancy. The additional partial or full copy of the 21st chromosome which causes Down syndrome can originate from either the father or the mother.There is no definitive scientific research that indicates that Down syndrome is caused by environmental factors or the parents activities before or during pregnancy. The additional partial or full copy of the 21st chromosome

Which parent carries the gene for Down syndrome?

The genetic basis of Down syndrome Half the chromosomes come from the egg (the mother) and half come from the sperm (the father).

Who is responsible for Down syndrome?

To date, no behavioral activity of the parents or environmental factor is known to cause Down syndrome. After much research on these cell division errors, researchers know that: In the majority of cases, the extra copy of chromosome 21 comes from the mother in the egg.

Can 2 Down syndrome parents have a normal child?

Any couple can have a baby with Downs syndrome, but it is well known that older women are more likely to have a baby with the condition than younger women.