Neurons in the brain's visual system that respond to particular characteristics of a stimulus, such as the lines and angles that make up the stimulus, are called .

Feature detection

Explanation:

Feature detection allows the nervous system to sort out and interpret the different types of stimuli that enters the eye. In this case the stimuli is the shape and orientation of the object as well as the difference between the actual shape and the background of the object.

This allows the organism to determine what is important and what really is just irrelevant.

"Males who inherit the mutation get the disease because they have no second dystrophin gene to make up for the faulty one. Early in the embryonic development of a female, either the X chromosome from the mother (maternal X) or the one from the father (paternal X) is inactivated in each cell."

(courtesy https://www.mda.org)