Dialog with Biology Professor
Friday, January 30th, 2004Just on the heels of last night when Dr. Emil Silvestru from Answers in Genesis talked about geomorphology, the feasibility of a global flood, the timing of the ice age, the practicality of the ark, the climatological patterns that have resulted from a giant dumping of fresh water from the Great Lakes/Ontario/Manitoba region into the North Atlantic, hydracanes resulting from shifts in plate tectonics sucking up huge amounts of water from the oceans, the unreliability of the fossil record and radiometric dating methods, harms of investigating evidence with a biased outlook, and tons, literally tons, of recent findings, calculations, and computer models on the flood, the age of the earth, and the lack of conflict between all current scientific and geologic discoveries and the Bible.
This is what we talked about in Biology 1040 today:
The Evolution of Sexual Reproduction (and why it is like it is today)
- A mutation in a prokaryote has immediate consequences for that organism. Why? Because it’s a haploid. If the mutation is not lethal, it is then transmitted to and expressed in offspring.
- A beneficial mutant allele spreads rapidly through natural selection. The evolution of sexual reproduction is a result of mutation accumulation.
- Mutations rarely improve on organisms to adapt to their environments (they’re already well adapted?) BUT when the random accumulation of mutations in specific gene results in the production of new and useful gene products, for example a protein for glucose transport, that confers improved reproductive sucess then natural selection tends to perpetuate the transmission of this new gene.
I asked Dr. Lindinger some questions right after the lecture:
I: “What exactly do you mean by rarely?”
Dr.: “Something like 1 in a million.”
I: “What are the chances of such mutations happening over and over again?”
Dr.: “..It’s not too bad. That’s a good question though.”
No, it wasn’t heated or anything like that. Just calm questions and answers. I sure hope that he will continue to think about those chances. And I sure hope that I can continue to learn about what biological evolution is all about so that I can continue to challenge what I believe and what “science” believes.