Saturday, June 24, 2006

I did not realize that turtles and aligators sex is determined by temperture. With turtles if the temperature is at the cool end of the spectrum then the offspring will be male, at the hot end females will develope. With aligators it is just opposite, but the problem is that the egges can only develope in a narrow temperature range, if it to hot or cold then the egges die.

It is amazing how many discoveries have been made with accidents in some laboratory. It was always difficult to count chromosomes and for some 30 years it was always thought that we had 48 chromosomes, everytime chromosomes were counted they were always ontop of each other, or scatterd and crowded about so there was no way to determine an exact count(they thought that they exact count was 48). Chromosomes could not be spread out flat to be counted with a microscope until an accident in the lab at the University of Texas. They were creating all kinds of cultures in various solutions, and not getting the resultes that they were desiring, and just by accident they created a salt solution that a techniction had mixed wrong, the result was that it spread the chromosomes over the slide flat so that they could be counted. Amazing. It it is amazing how many discoveries have been made in the world on accidents of this nature.

This is from the present book I am reading, "Adam's Curse" -- the book has nothing to do with Adam; for those inquiring minds. It is just a reference to the Y-chromosome. We have 46 chromosomes, 23 from the mother, and 23 from the father.

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