No.
What is it that you do not understand when I say I haven't a clue how all we observe came to be? I don't think we have the capability to understand any more than a young child can understand where babies come from. Introducing extraterrestrials just pushes the question back in time.
And, pray tell, what exactly is your "science degree" in?
I have degrees in math and physics.
As for the chromosome number, that isn't as important as having the proper number of genes, and that those genes exist in pairs.
Just because you type the words doesn't make them true. We have no idea how one species might morph into another, but we do know that each species has a characteristic number of chromosomes. The title Origin of Species and first paragraph of it imply that Darwin will have much to say about speciation. Yet his magnum opus remains largely silent on the "mystery of mysteries," and the little it does say about this mystery is seen by most modern evolutionists as muddled or wrong.
ML/NJ
I do not typically type anything that I am not already certain of, through my training and experience (PhD, biochemistry and molecular biology). And before I type it, I verify it. The reason I said what I did about the number of chromosomes not being as important as that the genes exist in pairs, is because of what I know about genetic aberrations. Most trisomies are lethal, not because of the extra chromosome, but because of the extra copy of so many genes. Many genes are only expressed off of one chromosome, with the copy on the other chromosome turned off. Adding an extra chromosome effectively doubles the expression levels of those genes, with what can be devastating effect.
Chimps have 24 pairs of chromosomes, humans 23 pairs. Yet our DNA is ~98% identical, and most of the differences are not in coding regions. Apparently, two early chromosomes combined in humans, giving us approximately the same number of genes as apes, despite having one less chromosome.
As for the other part, how one species morphs into another? All species constantly undergo a certain level of genetic change. It is unavoidable. During the process of meiosis, DNA undergoes some pretty drastic rearrangement, in addition to the normal mutations that always affect DNA. Since these random rearrangements and mutations are mixed into the population through the normal reproductive process, all it takes for speciation to occur is for the population to be split, perhaps by a geological event. At that point, the populations are still undergoing random mutations--but they aren't the same mutations in both populations. Given a long enough separation, the original species becomes two species. This process has been characterized in quite a bit of detail.