Gifted Issues Discussion homepage Forums Parenting and Advocacy Are siblings usually gifted also?

I'll agree with ultramarina too as there is good indication that intelligence is pretty heritable, but genes are also pretty complex and most families have some variety in a lot of things from curly/straight hair and height (also fairly strongly heritable) to IQ. Depending on how diverse the genes coming into play are, there may be more or less variability among the family members.

Also, in agreeing w/ ultramarina, family roles and personality can certainly impact whether a child outwardly presents as gifted. My dd14 is more obvious about her giftedness than my dd12 due to a number of factors including a greater 2e thing going with dd12, personality, and perhaps other things.