Which neuronal structures are located in the ventral horn?

Ventral horn consists of mostly Cell bodies of somatic motor neurons.

Assumed Information:

Assuming your question has multiple choices

A Central processes of sensory neurons  

B Cell bodies of visceral motor neurons

C Long myelinated and unmyelinated axons

D Cell bodies of somatic motor neurons

Reasoning:

The ventral horns consist entirely of inter-neurons (connects neuron to neuron). The ventral horns have some inter-neurons, but mainly house cell bodies of somatic motor neurons. These motor neurons send their axons out to the skeletal muscles (their effector organs) via the ventral rootlets that fuse together to become the ventral roots of the spinal cord.

the denominator has a very specific role.

the offspring would all be white. if the parents are both white flowers then they have the genotype rr, which when crossed results in an all white punnet square.