A True-Breeding Black Rabbit Is Crossed with a True-Breeding White

question 137

Multiple Choice

A true-breeding black rabbit is crossed with a true-breeding white rabbit. If the black color trait is dominant, which of the following represents the expected phenotype of an F₂ generation consisting of 8 individuals?

• A)8 black rabbits, 0 white rabbits, 0 grey rabbits
• B)2 black rabbits, 2 white rabbits, 4 grey rabbits
• C)0 black rabbits, 0 white rabbits, 8 grey rabbits
• D)4 black rabbits, 2 white rabbits, 2 grey rabbits
• E)6 black rabbits, 2 white rabbits, 0 grey rabbits

---

Definitions:

Central Nervous System

The part of the nervous system consisting of the brain and spinal cord, responsible for processing and sending out information.

GABA

Gamma-aminobutyric acid, an inhibitory neurotransmitter in the brain that helps regulate neuronal activity and reduces anxiety.

Acetylcholinesterase

An enzyme that breaks down acetylcholine, a neurotransmitter involved in muscle action and memory.

Seconal

A brand name for secobarbital, a barbiturate used as a sedative and hypnotic medication.