When Alleles in a Chromosome Pair Are Identical, They Are

question 117

Multiple Choice

When alleles in a chromosome pair are identical, they are said to be

• A) recessive.
• B) dominant.
• C) heterozygous.
• D) homozygous.

---

Definitions:

Neuron

A nerve cell that transmits information through electrical and chemical signals, playing a critical role in the functioning of the nervous system.

Excitatory Neurotransmitters

Chemical substances that promote the firing of neurons, facilitating communication within the brain and nervous system.

Inhibitory Neurotransmitters

Chemicals released by neurons in the brain that serve to inhibit or prevent neural signals, reducing neuron activity.

Neuron

A neuron is a nerve cell that is the basic building block of the nervous system, responsible for receiving, processing, and transmitting information through electrical and chemical signals.