the severity of symptoms is variable
it's not always an extra chromosome, sometimes it's only bits of chromosome 21, rather than the whole thing
(
finnbar has officially retired,
Wed 5 Oct 2011, 7:11,
archived)
interesting, thank you
this has also given me an idea
*books ticket for hull*
(
real i'm not happy 'til you're not happy,
Wed 5 Oct 2011, 7:28,
archived)