most cases of down syndrome are not inherited because DS is a genetic malfunction that occurs during conception
Quote:
Can Down syndrome be inherited?
Most cases of Down syndrome are not inherited. When the condition is caused by trisomy 21, the chromosomal abnormality occurs as a random event during the formation of reproductive cells. The abnormality usually occurs in egg cells, but it occasionally occurs in sperm cells. An error in cell division called nondisjunction results in a reproductive cell with an abnormal number of chromosomes. For example, an egg or sperm cell may gain an extra copy of chromosome 21. If one of these atypical reproductive cells contributes to the genetic makeup of a child, the child will have an extra chromosome 21 in each of the body's cells.
Mosaic Down syndrome is also not inherited. It occurs as a random event during cell division early in fetal development. As a result, some of the body's cells have the usual two copies of chromosome 21, and other cells have three copies of this chromosome.
Translocation Down syndrome can be inherited. An unaffected person can carry a rearrangement of genetic material between chromosome 21 and another chromosome. This rearrangement is called a balanced translocation because there is no extra material from chromosome 21. Although they do not have signs of Down syndrome, people who carry this type of balanced translocation are at an increased risk of having children with the condition.
This woman might have the third type of DS , the lab who sterilized her would probably know what type of DS she has, no? In this case, they are right, she can just adopt a child....she has an alternative but spreading a disease to the next generations IS the true crime against humanity ,the born child with DS because of this had no other alternative to prevent that, he would have DS because of some selfish ancestor woman who wanted a child for her own satisfaction.
However.....
Quote:
Fertility amongst both males and females is reduced;[42] there have been only three recorded instances of males with Down syndrome fathering children.[43][44]
So there's no much chance for them of having a child anyways.....