Question

Modern chicken is

• A. Gallus domesticus
• B. Gallus gallus
• C. Gallus sonneratii
• D. Gallus lafayetti

Hint:

The domestic chicken's taxonomic name Gallus gallus domesticus directly reflects its main evolutionary descent from the wild red junglefowl (Gallus gallus).

Answer 1

The Correct Option is B

Step 1: Understanding the Concept:
The modern domestic chicken is a domesticated subspecies of avian wildlife.
To understand its biology and classification, we look at its evolutionary origins and taxonomic designation.

Step 2: Detailed Explanation:
Genetic and archaeological evidence shows that the modern domestic chicken was domesticated from wild junglefowl species found in Southeast Asia.
The primary maternal ancestor is the red junglefowl, which is taxonomically classified as Gallus gallus.
While other wild species like the grey junglefowl (Gallus sonneratii) and the Ceylon junglefowl (Gallus lafayetti) have made minor genetic contributions to some breeds, the red junglefowl is the primary progenitor.
Taxonomically, the modern domestic chicken is classified as a subspecies of the red junglefowl:
\[ \textit{Gallus gallus domesticus} \]
In many scientific contexts and standard curricula, the species name Gallus gallus is used to refer to both the wild red junglefowl and its domestic descendants.
While Gallus domesticus was used as a historical designation, modern biological nomenclature classifies the domestic chicken within the species Gallus gallus.

Step 3: Final Answer:
Therefore, the modern chicken is taxonomically classified under the species Gallus gallus.