One of the studies that Bogin noted is a study among the Americans and Dutch heights. Back in the 1850’s Americans were considered the tallest people in the world, but now they are the third tallest around the world. This study revealed that this change is due to the plasticity in people’s childhood and in their mother’s childhood as well. Girls that are undernourished and in poor health causes them to be shorter in height as an adult due to the compromise her body makes while growing up. Her short height can then be passed down to her fetus. The small reproductive system of the mother most likely does not supply an adequate level of nutrients and oxygen to her fetus. Therefore, the child can be born weighing less than normal and will continue the slow growth through out their childhood. Stronger evidence used to support the study among height of group of people is the studies on monozygotic twins. Monozygotic twins are identical genetically, but sometimes can end up being nourished by unequal portions of the placenta. The twin nourished by the smaller fraction of the placenta, are born with lower birth weight than the one in the biggest fraction of the placenta. This difference in growth shows... [continues]
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