Where's the evidence? That is a statement of necessary convience to give the faithful hope.
The evolution of milk secretion and its ancient origins. [Animal. 2012] - PubMed - NCBI
Just one of many actual scientific research papers on the origin of mammary glands.
The variation in the genome can only produce a variation in the species, like eye color. It cannot produce a different species.
Correct. That is why you cannot get evolution from variation (or mutations) alone. You need several mechanisms working together to produce a different species. But one must first have variation or there can be no evolution at all.
I think of variation as being like the fuel in a vehicle. Fill your tank with gas, and you still won't go anywhere without doing a few other things as well--such as starting the engine and releasing the brake.
But those other things won't get you anywhere either, if you don't have fuel in the tank.
So variation is where we begin the story of how creatures evolve.
What was the first cell and did it have the necessary genome to to produce a life form othere than what it was?
It doesn't particularly matter what the first cell was, so long as it had the capacity to replicate its genome and to do so with high, but not perfect fidelity. What scientists are searching for is not so much the first cell, but the last common ancestor of the current generation of living creatures.
Names are not much help at this stage, but it is called LUCA (last universal common ancestor).
Did it have the necessary genome to produce a life form other than what it was? Depends on how you view "life form". And at what point you start to define a variation as a different species. At some point the descendants of the LUCA divided into two groups; one became the Archaea, the other became the Bacteria. And everything else proceeds from these. Both groups have shown the capacity to develop numerous variations and to branch out into different species.
The problems is that natural selection cannot be the mechanism for a change of species. The rabbit with the stronger legs may survive longer, but it is still a rabbit and its offsprings will still be rabbits and according to the gene pool, their kids may or may not hve the stronger legs.
This is where you need more background in both genetics and evolution. Yes, all descendants of rabbits will be rabbits, according to the theory of evolution. They may come to look very different from other rabbits, but they will still have traces of being rabbits. All ancestors of rabbits, OTOH, were not rabbits. Rabbits themselves are part of a larger group and came into existence as their non-rabbit ancestors developed varying lineages that went their separate ways.
On the genetics side, if rabbits with stronger legs survive longer, they are more likely to survive long enough to reproduce--perhaps several times. So the genetic combination which gave them stronger legs will remain in the gene pool. (Are you sure you understand what a gene pool is?) It might be that some of one rabbit's children will have weaker legs, but the genes will still be there in other rabbits and in the siblings of those rabbits, and if the rabbits with stronger legs keep on having more surviving and reproducing offspring than others, that variant will keep spreading through the gene pool.
Right but selection can only apply to the gene pool of the parents and the kids will still be the exact same species as their parents. Their eye color or hair color may change, but not their species.
Parents do not have a gene pool. They have a genome. I think you had better learn the difference between gene, genome and gene pool.
Yes, all children are the same species as their parents. It takes much more than one generation (usually) for part of a population to become a different species. Speciation is usually a slow process of separating the population into non-breeding groups.
Not true. Genetics refute evolution. The offspring cannot have a characteristic for which one of the parents did not have a gene for.
Yes, it can. Remember that changes in genes occur usually occur as the genome is replicating. And the only changes that count for evolution are those that occur in the germ cells.
When you were conceived, you had two copies of your genome: one from your mother and one from your father. When the zygote from which you developed split into two cells, you then had four copies of your genome. And when those cells split, you then had eight. Now you have trillions of cells in your body and all of them have a copy of the genome you inherited from your father and a copy they inherited from your mother.
But, wait, copies of genomes are not always perfect copies. Many of your cells will not have an exact copy of the genome you got from your father. There will be differences. Same with the copies of the copies of the copies of the genome you originally got from your mother. So if you were to compare the DNA in one of your cells with the DNA in a different cell, the chances are that they would not exhibit the same DNA sequence in several respects.
Now, as your cells proliferated and acquired differences in the copied genomes, did you become a different species? Of course not. You are still you, even though some of your genes may show differences from cell to cell. No one cell has enough influence to make you a different species.
Now, this miscopying can also occur in your germ cells, especially if you are a man, because men produce new sperm cells continually (unlike women whose bodies make a fixed number of egg cells which only reproduce when mature). So it is very possible that the genome you bequeath to your children is not the same as the one you inherited from your father or mother.
And so it is possible that a child will have a characteristic which neither of its parents had.
This is what is confusing. If you can't jump from one branch to another, you can't get another specvies. How do you get a hybrid in humans?
Again, this shows complete confusion about the process of evolutionary change. You actually don't know what the theory of evolution really says about it. Yes, you can get another species without jumping from one branch to another--in the same way that a branch puts out two or more twigs and a twig puts out two or more leaves.
You can't get a hybrid in humans today, because there is only one species. Possibly in the future, if humans become few and widely separated from each other with no possible way to meet and interbreed, our species may divide into two or more separate species. Then there could be human hybrids.
It appears this was the case in the past. A sister group to H. sapiens was H. neanderthalensis. And some evidence suggests that there was some mating between the two groups.
Most new species do not occur through bringing two existing species together (hybridization) but through dividing one species into two or more groups that no longer interbreed with each other (speciation). I say most, because there are some instances, especially in plants, where new species have been produced via hybridization. So both scenarios are possible. However, it appears that most new species come about through cladistic speciation (one branch dividing into two).
To get back to our rabbits. At some point in mammalian history, the mammalian main branch produced a branch that we now call the rabbit branch. Since the first rabbit branch was produced, it has divided and sub-divided into hundreds of different families and genera and species of rabbits. But, as required by the theory of evolution, all descendants of that first group of rabbits remain rabbits. Yet there are many, many different species of rabbits. So there was no need for any rabbits to jump to a non-rabbit branch to make new species of rabbits.
Give us some credit. We were all taught at least the basics of evoluion in high school and or college. Certainly you are not suggeting the the scientists who reject evolution do not understand what evolution says.
Well, I assume you have been to high school and possibly college, yet there are clearly basics you do not understand. Now as to professional scientists, yes, I think they understand evolution. I don't think they reject it for scientific reasons. I admire Todd Wood for being up-front about this. He certainly understands evolution (has a PhD in paleontology from Harvard) and agrees that evolution, from a scientific perspective, is a well-supported theory. But he has chosen reject evolution because it is not compatible with his belief in a young earth--which he believes is the biblical teaching. So, his rejection is faith-based, not evidence-based. And whatever other scientists say, I think the same is ultimately true of them.
I looked at the first 2 and all I saw was the usual evo rhetoric and no biological evidence. It seems all they ever say is we have this variety so it must have happened.
I'll get back to you on this in another post.
If the evo's guess is reight aboaut the irst life form, how did idt ever produce a kid with bones? It did not have bones, did not need bones to survive and did not have a gene for bones. The more complex the life form, the harder it is to explain, biologially of course.
Hey, even the first multi-cellular life did not have bones, so, of course, the early unicellular life did not. But almost all cells have the capacity to secret minerals which can harden into bone or shell. Some do and some don't. You can be glad of that. After all, when you were a zygote, you did not have any bones either. So how did you get them?