The doctor gave the kid a bunch of noise-making buttons.
And then he made a machine with an obviously pressable button on it.
He had to have known this would happen.

The baby is trying to climb up and press the button on the DNA scanner to find out what sound it'll make!

If his mother were back, she might have something to say about the blended DNA. But he's just a kid, and couldn't pronounce 'DNA', much less read it, even less know what it meant.