What kind of inheritance pattern is this?

[mensamedlem]

a) Autosomal recessive
b) Autosomal dominant
c) X-linked recessive
d) X-linked dominant

Squares = males. Circles = females.
Yellow = sick. Green = healthy.

http://www.flickr.com/photos/43724797@N08/4021842360/

[JackBean]

If it was X-linked, it must be recessive, because there is female on left, whose mother is healthy.
But it can't be X-linked, because 7 is ill, while her father is healthy, so it must be autosomal dominant
(so, the male at I is probably homozygot, or his children are just not lucky ones so his children are heterozygotes and thus half of their children is ill (their partners are healthy homozygotes))

[mensamedlem]

Thank you!