How likely is ehlers-danlos syndrome if one parent has symptoms/signs?

From 0 to 50% Ehlers-danlos syndrome (eds) is a group of inheritable disorders. There are two different inheritance patterns of eds, autosomal dominant and autosomal recessive. If you have the dominant type, there's a 50% risk of eds in your child. If you have the recessive type, eds can only occur if your partner also carries the recessive gene. A genetic counselor is needed to tell you your exact risk.

Related Questions

How likely is ehlers-danlos syndrome if one parent has some characteristics of it?

From 0 to 50% Ehlers-danlos syndrome (eds) is a group of inheritable disorders. There are two different inheritance patterns of eds, autosomal dominant and autosomal recessive. If you have the dominant type, there's a 50% risk of eds in your child. If you have the recessive type, eds can only occur if your partner also carries the recessive gene. A genetic counselor is needed to tell you your exact risk.

Could I have type 3 (hypermobility) ehlers danlos syndrome or hypermobility syndrome? My parents don't have eds.

Unlikely. Ehlers danlos is an inherited condition, so if it doesn't run in your family, it's very unlikely that you have it. If your joints are unusually flexible you may just be more limber than normal. But if you are worried about it, see your doctor and find out for sure.
See details. The difference is a matter of degree. Eds is most often a recessively inherited disorder so parents usually do not have the disease.

How likely is ehlers-danlos syndrome if mom and her brother's kids and some cousins have features of it?

Very likely. It is a genetic autosomal dominant for the most part and so it is expected that you wouls have relatives woudl also have it. You chance is 1 out of 2 or 50% that you can have it.