In cats the allele for short hair is dominant over the allele for long hair. A short haired male and long haired female have kittens. Eight kittens have short hair and 3 have long hair. A) What are genotypes of the parents? B) What is the expected ratio of short to long haired cats? C) What Is the actual ratio in this problem?

PNS → CNS → PNS

Explanation:

CNS is Central Nervous System and it consists of the brain and the spinal cord

PNS is Peripheral Nervous System which is made of peripheral nerves that connect CNS with the  receptors and effectors.

Receptors are structures for the detection of the stimuli (information)

Afferent nerves (sensory neurons) carry that information to the brain (CNS) where the information is processed.

Interneurons conduct information within the CNS

Efferent nerves (motor neurons) carry the information from the CNS to the effectors (muscles, glands) in order to perform response (move her hand out of the way).