Biological Sexual Development |  |
Chapter Overview| A Dimension of Human Sexuality...Biological Sexual Development. Within each person's body are many kinds of cells, but they all carry the same set of genes. Genes act like a blueprint that carries coded instructions for a particular trait or physical characteristics. Have you ever wondered why you have blue eyes and both parents have brown eyes? Or why you are 6'4" and both parents are short? The answers to these questions are not obvious, but genetic engineering may soon replace the biologist's explanation of dominant and recessive genes. |
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2002 McGraw-Hill Higher Education