NEET Class neet Answered
evolution of hen
Asked by gopikagopika412002 | 20 Apr, 2020, 11:22: AM
Expert Answer
Evolution of hen/chicken:
- The chicken's origins lie in a group of dinosaurs called the theropods, which evolved into two categories some 230 million years ago: the Ceratosauria and the Tetanurae.
- The Ceratosauria then split again into the ceratosaurids and the coelophysoids. The latter eventually resulted in the genetic line that produced the Tyrannosaurus rex.
- The phylogenetic analysis of T.rex fossil revealed that genetically speaking, the domestic chicken is the closest living relative of T. rex.
- The modern chicken is descended from several of four known species of wild jungle fowl (Gallus) that inhabited parts of Southeast Asia about 50 million years ago.
- Scientists believe the red jungle fowl, Gallus gallus, is the most likely progenitor of the modern chicken, although research suggests that the domestic chicken's yellow skin is a trait inherited from the gray jungle fowl, Gallus sonneratii.
- Thus, modern day hen or chicken has multiple ancestors from the past
Answered by Sheetal Kolte | 20 Apr, 2020, 07:51: PM
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