They were not Identical to their mother per say, since their mother has only one Z( ZW), their parthenogenetic sons have two copies of her Z Chromosome but due to Meiosis recombination their two Z chromosome are not 100% identical. They were just testing for Paternity but found that those two...
It is well known by DNA studies(taken out of a T-Rex) that the Chicken is the closest relative to T-REX,
This is the most recent work done by Dr. Christopher D. McDaniel on Parthenogenesis
Ramachandran, R. and C.D. McDaniel, 2018. Parthenogenesis in birds: A review. Reproduction...
Dinosaurs were and still(birds) more efficient than mammals.
The first milk giving fur coated mammal-like creatures were actually older than the first Pseudo Dinosaurs
By the Way ZW Parthenogenesis in birds and Lizards is much better than XX Parthenogenesis found on the Whiptail Lizards because it restores sexual reproduction because it creates only males and only the fittest will mate with the available female population instead of creating female clones of...
Parthenogenesis: Embryonic development in unfertilized eggs may impact normal fertilization and embryonic mortality
https://www.thepoultrysite.com/articles/parthenogenesis-embryonic-development-in-unfertilized-eggs-may-impact-normal-fertilization-and-embryonic-mortality
Turkeys have bene able to reproduce this way(very inefficient) and Chicken embryos have been able to be obtain but they die after a few days of incubation, so far no living chick have been able to hatch