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National Repository of Grey Literature 1 records found  Search took 0.01 seconds. 
Variability of cranial size and shape in modern humans
 Danda, Hynek ; Velemínská, Jana (advisor) ; Bejdová, Šárka (referee)
Variability of cranial size and shape in modern humans is affected by many different factors. Neutral evolutionary processes: mutation, genetic drift and migration; sex; but also the environment in witch the individual grows andt the food it recieves are responsible for this variability. Due to ethical constrains in experiments on humans and primates is very difficult to determine to what extent is for observed differences responsible selection and what proportion generates developmental plasticity. From the climatic factors temperature most likely forms the biggest selection pressure, which is evident especially on the facial part of the skull. Another important climatic variable influencing skull shape, nasal cavity most, is humidity. Within-population diversity decreases with increasing geographic distance from putative origin of modern human expansion.
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