<span>Reactive or evocative correlation. An example would be a child that shows particular interest and talent to sports. The parents are not particularly inclined to sports and grew up not playing them, but provides the child with opportunities to play and practice them. This action by the parents reinforces the child's genetic tendency to sports.</span>
If both of mr jone's parents were AB that means mr jone has both alleles for blood type a
Therefore there is a chance of 50% that they will have a child with blood type A.
Only a Punnet square with one homogeneous dominant would produce 100% dominant trait offspring.