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People with Down syndrome are no different from the rest of us, except they look slightly different and are not able to do as many things as "normal" people. Therefore, unless they have a severe case of Down syndrome, they should have normal marriage ceremonies.
No. Their minds are wired differently, so they might be exceptional in certain areas but have more difficulties in other areas. They are not mentally superior or mentally inferior. Their minds operate differently. No i'm just kidding of course they are.
people with ushers syndrome will have a normal life expectancy
Look at a downs syndrome person and if you are the same then you aren't normal!
Scheie syndrome is considered the mild form of MPS I. Individuals with Scheie syndrome usually have normal intelligence
Klinefelter's syndrome is not considered to be a variation of normal, so by definition it is abnormal.
A karyotype tells you if you have the normal ammont of chromosomes (46 for humans), it can also tell you if you have more or less and if this is the case what it is that you have. The most common syndrome would be Down Syndrome, or trisomy 21. Down Syndrome is also called trisomy 21 because if you look at a karyotype from someone that has this syndrome then they have three coppies of the 21st chromosome.
No. People with Klinefelter's syndrome have a normal Y chromosome and 2 normal X chromosomes.
Everyday life for someone who has Marfan syndrome is not too bad. They may be self conscious about how they look and have trouble learning new things but they can function as a normal human being in everyday life.
About the normal rate.
The parents have normal genotypes, because Klinefelter's syndrome is not inherited.