What can form volcanoes where two oceanic plates collide

A subduction zone is also generated when two oceanic plates collide — the older plate is forced under the younger one — and it leads to the formation of chains of volcanic islands known as island arcs. ... Earthquakes generated in a subduction zone can also give rise to tsunamis.

Explanation:

the child will have heterozygous dominant chromosomes as characters of his father are dominant over the characters of his mother.

the child is heterozygous