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What is gender and why does it exist?

What is gender and why does is it exist as a primary feature of the animal kingdom? Sexual reproduction is costly and not very efficient in resources.

'The Picture Has Creationists Terrified'--Side-by-side comparison of the chromosomes of humans, chimpanzees, gorillas, and orangutans (from left to right for each chromosome) From JJ Yunis, O Prakash, "The origin of man:  a chromosomal pictorial legacy"

This Picture Has Creationists Terrified And no wonder: It's the most powerful evidence for evolution that you can imagine. Side-by-side comparison of the chromosomes of humans, chimpanzees, gorillas, and orangutans (from left to right for each chromosome)

Brown to blue

Originally, we all had brown eyes. But about years ago, someone who lived near the Black Sea developed a genetic mutation that turned brown eyes blue. While the reason blue eyes have persisted remains a bit of a mystery, one theory is that they act

What Is Epigenetics and Epigenetic Inheritance? Natural Health Newsletter  We've discussed epigenetics before -- for example, back in 2007 when we talked about how the dietary and environmental choices we make today affect our children…and their children. And now it seems, that almost every day, scientists are discovering how prominent a role epigenetics -- alterations in the way genetic traits express themselves without any changes in the DNA sequence itself -

Epigenetics: the way genes express themselves differently with no changes in the underlying DNA sequence.

#Dios: Una hipótesis que se puede poner a prueba

Pre-Historial Human Existence Geological time and the history of life chart.

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