Assume That a Dihybrid F₂ ratio,resulting from Epistasis,was 9:3:4

question 46

Multiple Choice

Assume that a dihybrid F₂ ratio,resulting from epistasis,was 9:3:4.If a double heterozygote was crossed with the fully recessive type,what phenotypic ratio is expected among the offspring?

• A)1:1:2
• B)1:1:1
• C)9:3:4
• D)1:2:1
• E)12: 3: 1

---

Definitions:

Synaptic Cleft

The space between two neurons where neurotransmitters are released from one neuron to another.

Dopamine

A neurotransmitter involved in mood, motivation, reward, and the coordination of movement, playing a vital role in the brain's pleasure and reward system.

Serotonin

A neurotransmitter involved in the regulation of mood, anxiety, and happiness, among other physiological processes.

Norepinephrine

A neurotransmitter and hormone involved in the body's fight or flight response, affecting heart rate, blood pressure, and sugar metabolism.