Has microevoulution ever been observed through DNA?

Question

My question is asking if any scientists have ever actually observed the traits of a cell through the DNA structure to really see if mircroevolution has occurred(Yeah I know people say microevolution occurs all the time but how exactly has that been checked?). An example would be to observe an offspring and compare it to the parent DNA. If the offspring had any changes that the parent did not contain(not counting any loss of information) then that could be considered a form of microevolution right? I know it may be hard to do since alot of "junk DNA" can be hard to identify, but could it still be done?

to those pf you who have answers, would you actually care to tell me who observed it and host a web link to it?

Answer 1

Of course this has been observed - its called a mutation. It happens all the time and can actually be observed during meiosis. You can see through a microscope that some pieces of DNA are sometimes lost or gained, and that some strands of DNA cross over each other and get attached in a new way to the opposite DNA strand. You might call this is an evolutionary event if the offspring survives and passes along any of the new traits.

The vast majority of new traits are fatal, so it is rare when the traits get passed on to the next generation, and even rarer when a new trait provides a selective advantage. However, new traits have been observed to emerge in species that produce huge numbers of offspring, such as fish hatcheries that produce fish in the millions or billions. Occasionally, there are fish that have distinctively different body forms, behavior, or features that set them apart from their parents. When the DNA is examined in these unique individuals, the traits may sometimes be an expression of rare recessive genes, but in many cases, there are genetic markers that do not exist in either parent.

Answer 2

Yes. Bacteria are the easiest to study and scientists have been studying a type of bacteria discovered that has developed to digest specific petroleum based chemicals that never existed before humans created them.

Biologists have been able to identify the specific genes that were modified to give the bacteria this ability.

Answer 3

I suppose I shall both be Pennywise the Dancing Clown from It or Belle from Beauty and the Beast... I do not know which one to be. Maybe I might be Bellewise the Beasting Clown.