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(July 2007)| Developmental biology is the study of the process
by which organisms grow and develop. Modern developmental
biology studies the genetic control of cell growth,
differentiation and morphogenesis, which is the process that
gives rise to tissues, organs and anatomy, and even regeneration
and aging, more recently. The development of a new life is a
spectacular process and represents a masterpiece of temporal and
spatial control of gene expression. Developmental genetics
studies the effect that genes have in a phenotype, given normal
or abnormal epigenetic parameters. The findings of developmental
biology can help to understand developmental abnormalities such
as chromosomal aberrations that cause Down syndrome. An
understanding of the specialization of cells during
embryogenesis has provided information on how stem cells
specialize into specific tissues and organs. This information
has led, for example, to the cloning of specific organs for