razzelflabben said:
Okay, I am functioning on about 3 hours sleep, my eyes are getting blurry and I have some other issues on the forum I need to address before I get off for the night. I would appreciate things slowing a bit so I can keep up but this thread has a mind of it's own. Hope I don't miss something important.
Hey, you don't have to come to this board every day. And you don't have to answer every new post in one day. Just let us know when you are signing off for the day and that it may be a day or two before you get back. Basically, the thread will slow down if you do. Or if it keeps going it will be other people's conversations that you can ignore.
Do you know how to navigate using the "threaded mode". That way you only need to look at responses to your own post and can ignore side conversations.
How do new species occur? The mixing of genes?
Not usually no. I have met other creationists who think that cross-breeding is essential to evolution. But in the very first chapter of
Origin of Species Darwin writes a segment on why this cannot be the case. Most new species occur through the
prevention of breeding within the species, as we have shown you. Not through crossing different species.
If I breed two creatures that have similar but not identical genes, which set of genes does the offspring take? Remember, the answer cannot be both or you just answered your own question.
Actually the answer can be both. There is an exception to what I just said above, about cross-breeding between two different species not being the usual way to get new species. It is rare (for all I know, non-existent) in animals, but it is found fairly often in plants.
It is called "hybridization + polyploidy". Now, as you know, crossing two types of plants to get a hybrid is relatively common. Lots of seeds are hybrids. But these hybrids don't make new species. You can only use them in your garden for one year's planting. If you save the seed and try to reuse it, it will either not germinate at all, produce weak seedlings, or in any case give you a weird mixture of characters some of them not seen in the parent hybrid at all.
Why this happens is explained by Mendelian genetics.
So hybridization alone will not give you a new species.
But when you add "polyploidy" to hybridization, you can get a new species.
One reason hybridization alone will not give a new species is that the male parent's chromosomes and the female parent's chromosomes do not match up well and make reproduction difficult.
Polyploidy is a mutation that gives the new species a double set of the male parent's chromosomes, and a double set of the female parent's chromosomes. In short, the new species has a new chromosome number which is equal to the chromosome number of the two parents added together.
Now, because the new species has a double set of both the male and female parent's chromosomes, every chromosome has a familiar mate to pair up with, and cell division for reproduction occurs normally with none of the problems seen in hybrids without polyploidy.
Where do the hundreds come from? How do we get variations, if this is inconsistant with the TOC?
How do we get variations even with TOC? How does TOC explain variation?
A common ancestor, that was a single celled organism that was not a single celled organism at all but rather a population of single celled organisms that came from an unknown source to populate the earth.
Not from an unknown source. From abiogenesis: the creation of life from what is not living. You know, like in the book of Genesis.
Where does Genesis say God created only two snails or only one fig tree?
Of course, scientists are also working out how God caused abiogenesis from natural causes as lucaspa described. But those causes also suggest that the first living form emerged as a population, not as one or two individuals.
Single cells reproduce asexually, so there is no mating. But evolution still happens because there are still copying error in the DNA to make variation between single-celled organisms.
Right that explains all the reproductive processes we know today.
No, it explains why there were no mating problems as with the mule. Changing the question after you have been given the answer to the one you asked is hardly fair. You did not ask about "all the reproductive processes we know today."
Nope sorry, I was told on this thread that all the unanswered questions were answered.
All
your unanswered questions have been answered, at least the ones you've asked, and when you ask more, I expect there will be answers for them too. The unanswered questions lucaspa was referring to are not the same questions.
So, while we don't know all the various ways that populations can become isolated, we do know that, when they are isolated facing new environments, new species will evolve.
But not that they did. That is why it is still a theory. Because we assume that it did.
What are you saying? That we can be sure, as lucaspa said, that new species
will evolve, but that we cannot be sure that today's species
did evolve?
Why not? There are a lot of things about todays species (those ERVs and ALUs among others, and ring species, and those stubbornly infertile mules) that cannot be explained in any other way.
lucaspa said:
Sorry, but TOE is based on the idea of common ancestors. Not a single organism. If life arose from non-life via protocells, as I think is likely, there were billions of organisms. If life arose by the RNA world, there were billions of RNA molecules. At least! Probably trillions or even higher.
As you think likely, I thought we had overwhelming evidence!!!!
Overwhelming evidence of evolution. Here lucaspa is talking about abiogenesis, not evolution.