Can downs syndrome be recessive?
Down’s Syndrome is not recessive. It is also known as Trisomy-21, meaning that instead of having a pair of 2 chromosomes in the 21st group, there are 3 chromosomes. It is pretty much a random genetic fluke – it is not something that is pased down from parents to children in the way you are thinking. In the past, they found a connection between a mother being older at the time of the child’s birth and Down’s, but recent studies have found that it may not be the case. Your girlfriend is not any more likely to have a baby with Down’s Syndrome than any other woman her age walking down the street.
