Is That a Boy Gorilla or Girl Gorilla?
"Isabella", the gorilla referred to as "she" throughout the film, has no breasts, and has a head crest and "silverback" grey hair, all exclusively male characteristics.
Why Did They Cut a Mouth Hole?
When the team of scientists were covering Kevin Bacon's character with Latex, the put a tube in his mouth so he could breathe. Later we see him cutting a hole where his mouth is. Wouldn't the tube have left a hole where his mouth is?