Mutation and evolution

[cambrian_exp]

well see this...http://www.christiananswers.net/q-eden/genetic-mutations.html

 

Mutations behave like a "blind gunman," a destroyer who shoots his deadly "bullets" randomly into beautifully designed models of living molecular machinery.

 

In all this research, not one mutation that increased the efficiency of a genetically coded human protein has been found. !!!

then how can evolution happen?

[cambrian_exp]

In order for a mutation to be inherited, it must occur in the genetic material of a sex cell

. but what about asexually reproducing animals like microbes? how then they evovled in to sexually reproducing animals? thus evolution cant work without genetic variation and only mutation can bring that!

[Skye]

Mutations behave like a "blind gunman," a destroyer who shoots his deadly "bullets" randomly into beautifully designed models of living molecular machinery.

 

In all this research, not one mutation that increased the efficiency of a genetically coded human protein has been found. !!!

 

then how can evolution happen?

Because that's creationsist bollocks. Look up 'beneficial mutations' in the search engine of your choice, even on this site, I'm sure it's come up before.

In order for a mutation to be inherited, it must occur in the genetic material of a sex cell

. but what about asexually reproducing animals like microbes? how then they evovled in to sexually reproducing animals? thus evolution cant work without genetic variation and only mutation can bring that!

'Sex cell' would imply that what you are talking about is a gamete of a sexually reproducing multicellular organism. It is nonsense to apply this to a single cell organism.

[the tree]

In all this research, not one mutation that increased the efficiency of a genetically coded human protein has been found.

I'd say the human immune system is pretty positive. The human brain also seems pretty cool. Oh, and hands, I like hands.

In order for a mutation to be inherited' date=' it must occur in the genetic material of a sex cell[/quote']If you find me one qualified scientist that makes that claim, I will consider taking that serioisly. As it stands high school biology accounts for genetic inheritance in both mieosis and mietosis.

[LucidDreamer]

In all this research, not one mutation that increased the efficiency of a genetically coded human protein has been found. !!!

 

then how can evolution happen?

Notice that they reduced the argument to only genetically coded human protein. They did this because it has been observed in bacteria yeast, and viruses. Bacteria, yeast, and humans all share the same DNA->RNA->Protein mechanism as well as very similar methods of producing proteins from DNA.

In all this research

This is a deliberate attempt to mislead you. All of the research that would allow us to observe an increase of efficiency of a protein through mutation was done on microorganisms such as bacteria and yeast. You cannot expose humans to radiation and grow thousands of them in a lab because of ethical reasons as well as generation times. The research done on humans is very limited and usually involves studying people that have a disease and looking for the mutation.

 

Mutations that increase the efficiency of a protein have been observed in humans. Some HLA proteins on human cells bind certain antigens more tightly than other HLA proteins. The variety of protein binding within the HLA alleles is needed so an individual can bind many types of antigens to ward off infection. Also, the variety is needed so that some individuals in a population will survive an epidemic, even if others will not.

 

There are literally hundreds of different alleles for the HLA proteins. Since each human can have only a few alleles for the HLA proteins there is no way that two humans could have the hundreds of alleles that have been observed in the human gene pool. The only way to account for the variety is through mutation. Since the variety of HLA alleles makes a population more resistant to being wiped out by infection, the mutations that have resulted in different HLA proteins, with their different efficiencies of binding to different proteins, have been advantageous to the human population.

[cambrian_exp]

well thanks SKYE for telling me to search for term 'beneficial mutations' . now i realy think that evolution is true

[Sayonara]

If you are going to respond to the replies that you asked for using selective vision, then you may well find soon that you can only post in selected forums.

 

Play nice, IOW.

[Skye]

You're quite welcome.