Puzzle 4

CEO; chief __ officer; top dog at work.

Epistolary novel written by Jane Austen.

Genes that aren't dominant.

He played Heimdall in Thor.

Romantic card traditionally given on February 14.

Shaft for steps in a building.

Superman's archenemy and wealthy businessman.

These lizards would excel at hide and seek.

Travel documents that show citizenship.

Unclear, can be interpreted in more than one way.

Where you shouldn't put all your eggs.