- #1
Forestman
- 212
- 2
Dose our DNA contain all the old information of the species that our species came from? For example, do we still contain the old DNA of the first mammals, or the reptiles that evolved into the first mammals?
Our results demonstrate that the parathyroid gland of tetrapods and the gills of fish most likely share a common evolutionary origin; both express Gcm-2 and require this gene for their formation, and both express PTH and CasR. We thus suggest that the parathyroid gland came into being as the result of the transformation of the gills into the parathyroid glands of tetrapods.
Andy Resnick said:In addition, many fish are tetraploid rather than diploid. At the protein level, I have seen people present sequence homologies at the level of 50% and claim the proteins have identical function... at least in terms of model organisms.
Danger said:Here you go.
"www.pnas.org/content/101/51/17716.full?ck=nck"[/URL][/QUOTE]
I got to thank you for showing me this- it's led to several fascinating discussions today. I didn't know about how the parathyroid regulates calcium.
DNA, or deoxyribonucleic acid, is a molecule that contains the genetic instructions for the development and function of all living organisms. It is made up of a long chain of nucleotides and carries the genetic information that is inherited from one generation to the next.
DNA is inherited from a person’s parents. Half of a person’s DNA comes from their mother and the other half from their father. This is why children often resemble their parents in terms of physical appearance and other characteristics.
While DNA is mostly stable, it can undergo changes or mutations over time. These changes can be caused by various factors such as environmental factors, exposure to radiation, or errors during DNA replication. These changes can sometimes lead to genetic disorders or diseases.
Yes, DNA can be used to trace ancestry. By comparing DNA sequences, scientists can determine the genetic relatedness between individuals and trace their ancestry back to a common ancestor. This is often done through genetic testing and analysis.
Studying old DNA can provide valuable information about the history and evolution of species, as well as the genetic changes that have occurred over time. It can also help us understand the migration patterns of humans and other species, and provide insights into the origins of diseases and how they have evolved.