Choose the true statement regarding second-order neurons.
1. Second-order neuron cell bodies reside in a ganglion.
2. Second-order neurons conduct impulses to the spinal cord or brain stem, where they synapse.
3. Second-order neuron cell bodies reside in the dorsal horn of the spinal cord.
4. Second-order neuron cell bodies reside in the thalamus.

3. Second-order neuron cell bodies reside in the dorsal horn of the spinal cord.

Explanation:

The Anterolateral System, also called spinothalamic, carries information about pain, temperature, coarse touch or pressure, and itching and tickling sensations. This system mainly contains slow conduction fibers

The spinothalamic pathway can be subdivided into two: the neospinothalamic pathway the fibers project into the somatosensory cortex and the paleoespinothalamic pathway with projections at different points in the thalamus. The neospinotalamic pathway has the axons of the first-order neurons that establish synapses on second-order neurons, located in the dorsal horns of the spinal cord.

multiple allele inheritance is traits controlled by more than 2 alleles (ex: pigeons having 3 alleles of one gene govern their feather color).   so the answer is a.