Irlen Syndrome is definitely genetic. Research has shown that in 83% of 265 subjects studied, either mother, father or both also had Irlen Syndrome. At this stage we do not know if it is recessive or...
XYY syndrome can be said to be "dominant" because if a person has it, they have it. there is no having a recessive gene for this.
However, technically, it is neither. XYY syndrome is not...