Comb Shape in Chickens Also Involves the Interaction of Two

question 30

Essay

Comb shape in chickens also involves the interaction of two genes, but the F2 generation shows a typical 9:3:3:1 Mendelian ratio. How does this work?

---

Definitions:

Cell Body

The part of a neuron that contains the nucleus and most of the cytoplasm and organells.

Excitatory

Pertaining to or causing excitation, often describing neurotransmitters or synaptic inputs that enhance the activity of neurons.

Inhibitory

Characteristic of a substance or process that decreases the activity or efficiency of a neuron or an enzyme, typically reducing or stopping certain signals or reactions.

Neurotransmitters

Chemicals in the brain that transmit signals across a synapse from one neuron to another, playing key roles in the regulation of bodily functions and emotions.