I want to be very clear, I am not saying that there is anything wrong with people with Down syndrome having or raising children. I am confused because I learn in high school biology that animals like mules cannot reproduce because of their odd number of chromosomes so why is this not true for humans with an odd number of chromosomes?
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There’s actually almost no difference between humans and other animals in this regard. In both cases, an odd number of chromosomes leads to sterility or reduced fertility. Usually, odd numbers of sex chromosomes is better tolerated and allows for the greatest chance of reproduction.
Most people with an odd number of chromosomes are unable to have children.
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