A Tutorial in Human Behavioral Biology
Category: Anthropology
An overview of the classic literature in my field of study.
Posted by Greg Laden at 3:14 PM • 2 Comments • 0 TrackBacks
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Genetics:
The Genetics of Pesticide Resistant Bedbugs
Category: Genetics
Bedbugs (Insects of the Cimicidae family, commonly Cimex lectularius) are annoying, might carry diseases (though this is unclear, so probably nothing importat1, and are apparently becoming more common in the US. Interestingly, there has been very little study done of their genetics. A new study...
Posted by Greg Laden at 5:00 PM • 3 Comments • 0 TrackBacks
What is the most important human adaptation?
Category: Brain and Behavior
Human infants require more care than they should, if we form our expectations based on closely related species (apes, and more generally, Old World simian primates). It has been said that humans are born three months early. This is not accurate. It was thought that...
Posted by Greg Laden at 11:30 AM • 13 Comments • 0 TrackBacks
A genetic cause of rapid degeneration in some Alzheimer's patients
Category: Alzheimer's
A new study identifies a likely cause of rapid degeneration in some Alzheimer's patients. The results of this study may lead to improved treatment. But first, let's look at the method used in this study, because that may be almost as important as a development....
Posted by Greg Laden at 5:00 PM • 9 Comments • 0 TrackBacks
Why didn't Darwin discover Mendel's laws?
Category: Charles Darwin
Perhaps we are all subject to falling into the trap of what I call the Hydraulic Theory of Everything. If you eat more you will be bigger, if you eat less you will be smaller. Emotional states are the continuously varying outcome of different levels...
Posted by Greg Laden at 2:09 PM • 15 Comments • 0 TrackBacks
Reflections on the Origin of Species
Category: Agassiz
The The Origin Of Species by Charles Darwin was published 150 years go as I write this. At the time, several different alternative theories of the origin and history of life were being discussed in the West. Some of these theories were theological. Theological ideas...
Posted by Greg Laden at 9:50 AM • 8 Comments • 0 TrackBacks
Evolutionary enamel loss linked to molecular decay of enamel-specific gene
Category: Paleontology
The evolutionary history of mammals can be reviewed as the evolutionary history of tooth loss. The early mammals had many teeth, and every now and then in evolutionary time, a tooth is lost wiht subsequent species arriving from that n-1 toothed form having that smaller...
Posted by Greg Laden at 4:10 PM • 0 Comments • 0 TrackBacks
The Three Necessary and Sufficient Conditions of Natural Selection
Category: Natural Selection
Natural Selection is the key creative force in evolution. Natural selection, together with specific histories of populations (species) and adaptations, is responsible for the design of organisms. Most people have some idea of what Natural Selection is. However, it is easy to make conceptual errors...
Posted by Greg Laden at 5:09 PM • 30 Comments • 0 TrackBacks
Falsehoods: Has evolution stopped for humans?
Category: Falsehoods
In my initial s.php">list of Falsehoods, I included these two closely related items: Evolution has stopped for humans; and Serious scientists often entertain the question: "Has evolution stopped for humans?" I'll make the distinction between them clear eventually. For now, let's focus on the first:...
Posted by Greg Laden at 11:55 AM • 34 Comments • 0 TrackBacks
Happy Birthday Gregor Mendel
Category: Genetics
Mendel was born on July 20th, 1822. He is famous for his discovery of peas and genetics. Here is his stuff translated into English....
Posted by Greg Laden at 8:43 PM • 8 Comments • 0 TrackBacks
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