GENETICS
Introduction
Within our cells are genetic storehouses that utilize information passed on from our ancestors through the union of egg and sperm and, in combination with environmental factors, determine the shape and functioning of our bodies and some aspects of our abilities and personalities. DNA is an important component of this genetic material and it is now possible to study it and to map out patterns and characteristics of our chromosomes that can be identified from tissue samples from bone, hair, and saliva.
The invention of the microscope, in the 17th century, was the most important tool unlocking our understanding of cells. Yet, ...
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