It's either a mutation with the gene, or either the mother or father donates an extra chromosome.
2nd Answer:
True, and Down syndrome is not a genetic disease and has nothing to do with family history.
By the way, the kind of chromosomal mistake that causes Down Syndrome occurs in many people, but on different chromosomes. Mostly, your body is so tolerant of this kind of mistake that you never see any results.
having a family history of AD, Down syndrome, or Parkinson's disease
Down Syndrome is a the addition of an extra chromosome and not really related to evolution. It is more of a genetic mutation that causes this event to occur.
Yes! Down Syndrome is not a genetic disease. ANYBODY can be born with Down Syndrome, even if 100 or 0 people in their family have it.
The number is the same everywhere.
Down's syndrome is increased with advanced maternal age, which is defined as more than 35 years of age.
both parents with a family history of the disease pass a defective gene to the child before they are born
Down syndrome is something you are born with; it is not something that will suddenly "appear."
If you have no history of birth defects in your family, such as Down Syndrome, and your eggs are free of inflictions, then yes, most likely.
I've always heard that you should not get an amniocentesis in this case. There is a chance it could damage the baby. I've had 3 children and I wouldn't do it unless there was a history of something serious.
It could be possible to live a normal life if you have Down Syndrome if you get alot of support from family, friends, anyone close to you really
yes. if that is true, then that means that down syndrome is genetic in yourfamily. try researching it up. look it up on google. i highly reccomend wikepedia.the more you know, the more able you will be to understand these poor kids.allison386Calling them "poor kids" is offensive. Down syndrome is a relatively common, and random, genetic variation--unless it is of the translocation type, which is a lot less common and is heritable.
Some of the conditions that occur more often among children with Down syndrome include: heart defects, vision problems and hearing loss.