Question

Which of the following genetic conditions is caused by an extra chromosome on the 21st pair?
(Points : 1)
Down syndrome

Turner's syndrome

Huntington's chorea

Korsakoff's disease

Kleinfelter's syndrome

I'm not sure.

Answer 1

@jim_thompson5910

Answer 2

it's not Turner's syndrome because that is caused by a missing X chromosome

http://en.wikipedia.org/wiki/Turner%27s_syndrome

Answer 3

it's not Huntington's chorea either

http://en.wikipedia.org/wiki/Huntington%27s_chorea

"The disease is caused by an autosomal dominant mutation in either of an individual's two copies of a gene called Huntingtin, which means any child of an affected person typically has a 50% chance of inheriting the disease. "

Answer 4

see how I'm going one by one and eliminating options?

Answer 5

or no?

Answer 6

yah i do, but im working on something else right now which is y i posted these questions

Answer 7

@jessica_the_meow

Answer 8

ok work on that and come back