Chapter 16 The Molecular Basis of Inheritance Lecture Outline Overview: Life’s Operating Instructions In April 1953, James Watson and Francis Crick shook the scientific world with an elegant double-helical model for the structure of deoxyribonucleic acid, or DNA. Your genetic endowment is your DNA, contained in the 46 chromosomes you inherited from your parents and the mitochondria you inherited from your mother. Nucleic acids are unique in their ability to direct their own replication. The resemblance of offspring to their parents depends on the precise replication of DNA and its transmission from one generation to the next. It is this DNA program that directs the development of your biochemical, anatomical, physiological, and (to some extent) behavioral traits. Concept 16.1 DNA is the genetic material. The search for genetic material led to DNA. After T. H. Morgan’s group showed that genes are located on chromosomes, the two constituents of chromosomes —proteins and DNA—were became the candidates for the genetic material.
This is the end of the preview.
access the rest of the document.